Notes: Hey, cuties!
How are you lovelies doing?
I hope you like the update! I gotta inform you that my work will be a bitch in the next few weeks, because I work for the government and it's election time. I'll try my best to keep updating at the same consistency as before, but I can't promise anything right now. 2020 have to end, fast! I'm losing my mind with this goddamn year. Urgh.
I gotta thank once again my friend Sabrina for beta reading this chapter! I love you, girl!
Anyway, I hope you enjoy this chapter! Please comment and tell me your thoughts, it inspires me to write faster, I love reading your opinions very much!
See ya!
LINEAGE
By PCSP
Chapter 9
When Vergil woke up that morning, he felt slightly more energized. At first, he thought that the kiss had done its job better than he intended (after all, he was supposed to get some energy from Dante by kissing him, but not that much). But it didn't take long for him to notice that, despite Dante not being in the room that morning, he was not alone: the energy he felt must've come from the intruder, since he was absorbing it unconsciously. He stopped the absorption immediately.
Stunned and ready to defend himself with Yamato, he only became aware of who his company was when his katana jingled with the impact against a metallic arm. Nero hadn't been caught off guard by the impact, because he defended himself faster than Vergil expected him to (which was a relief, Vergil didn't really want to hurt his cub more than he already did).
He lowered Yamato at the same time she sang in his head, expressing her desire to fight against Nero, or be handled by him. It was difficult to know exactly what Yamato wanted, but she was really found of Nero, and that made Vergil feel proud and jealous at the same time.
He didn't know what happened between Nero and Yamato, and he wasn't sure he wanted to know. He was possessive of his belongings, after all (even if Yamato could technically be considered Nero's inheritance and such feeling of jealousy was indeed pointless).
Oblivious to his father's thoughts, Nero stepped backward and frowned, displeased by the lack of greetings.
"Good morning to you too." Nero sarcastically scoffed, pointing at the nightstand with a broad gesture, "I brought you some coffee."
Vergil blinked slowly, as if the concept of Nero doing such thing was difficult to comprehend, and looked to the direction he pointed at.
There was a tray with a cup of black coffee, a plate of pancakes and a red apple. Nero wasn't lying, he actually brought him breakfast in bed.
He felt something akin to happiness; if he was triggered, he sure would purr. He was glad he was in his full human form, though, because he was proud enough not to show the joy he felt after witnessing his cub do something so cozy for him. He knew Kyrie had something to do with it, but it didn't matter: Nero still brought him food, and Vergil was hungry. Even though hybrids didn't need to eat so regularly (something Dante certainly didn't give a damn about, since he ate every time he had the opportunity to do so), he had skipped all the previous day meals and he needed to eat.
So Vergil settled his back against the headboard and pulled the silver tray to his lap, bringing the warm cup to his lips and letting out a sigh of approval when he realized that the coffee was indeed pure, without milk or sugar, as he fancied. Apparently, Dante still remembered his culinary preferences, and didn't hesitate to teach Nero that.
Nero noisily pulled the chair from the corner of Dante's room and sat down on it, leaning over the back and watching his father feed, as if Vergil was an extremely interesting zoo animal. It was surreal to Nero to see someone so dangerous look so vulnerable.
"Dante said you are sick." Nero broke the silence, since it was clear Vergil wasn't going to initiate chatting.
The older Sparda raised an eyebrow, but he quickly redirected his attention to his food once again. He took a bite from his apple and chewed it slowly, thinking how he could deal with that subject with Nero.
'Sick' was certainly not the correct term, quite the opposite: his heat was happening only because Vergil is finally healthy again. Mundus' corruption had destroyed his body so much in the past that he thought it was impossible for him to have a heat again, but apparently the Qliphoth fruit made it possible. Oh, what a joyful side effect the fruit had... Well, he supposes he couldn't complain, at least he knew he that health was back at his side.
Vergil told the boy to ask Dante about alpha's biology, so Dante probably taught the boy something about omega's heat, since it was a co-related subject. But maybe Dante didn't explain much about it, since his brother seemed to be shy about that stuff. It was really frustrating that Dante was obscene and irritating in regards of all aspects of human sexuality, but when it came to demonic sexuality, he acted like an extremely embarrassed virgin nun.
"Aren't you going to say anything?" the boy asked after a long silence.
Vergil swallowed loudly, looking at Nero as if he didn't know what he could do except eat the meal offered to him.
"What do you want me to say?" he murmured back.
"A 'thank you' would be nice."
Vergil simply put a piece of pancake in his mouth, and Nero just rolled his eyes impatiently.
"OK. Forget it, I knew I shouldn't expect something polite from you. Can you at least tell me what are you feeling? I will be leaving shortly with Kyrie to buy some things for the baby and I can bring you medicine, but I need to know what your problem is."
"Demons don't get sick, boy." Vergil replied dryly, as if judging Nero intensely for his ignorance, "I thought you knew that already."
"Hey, I know that!" Nero defended himself, crossing his arms, "But when we first met you didn't look well, so I think maybe you can get sick? I dunno, Dante didn't seem like he was joking about it."
Nero was referring to the fateful meeting that resulted in the loss of his arm. Really, Vergil was not in one of his best forms at that moment, driven only by survival instinct and knowing that he would die if he did not find Yamato fast. Mundus' corruption functioned as a strong disease, which he could not deny, but it wasn't a disease per see.
He didn't wish to go into that subject at the moment, though.
"That inconvenience was solved, as you can see." Vergil responded, gesturing to himself, "I assure you I am not sick."
"So why are you in bed resting?"
Well, that's convenient.
Naturally, Nero couldn't feel his eminent heat; only Dante could feel it. That's fortunate aspect, since Vergil didn't want to cause a big commotion between his alphas (yes, Dante is his, but so is Nero. Even if Nero was his kid and he didn't want to mate him, Vergil was possessive enough to view the two alphas as his propriety). Vergil did not know whether Nero was unable to feel his heat because of kinship or because of that detail (and, frankly, he was surprised that this particularity of his body had remained intact to Mundus' corruption), but it was extremely convenient that he remained neutral in that regard.
"I'm close to my heat." He answered, as unceremoniously as that.
"... Your what!?" Nero was sure he heard it wrong, because Vergil wasn't the kind of people to joke around, and he was sure there wasn't any other possibility.
The older Sparda, on the other hand, didn't seem phrased by Nero's surprise.
"As a consequence of my body demands for energies, necessary to extend my kinship and survive this little inconvenience cycle, my body becomes more vulnerable during the period, needing longer periods of rest. Therefore, I did my nest here, so I can-…"
"Did you really say 'nest'?" Nero was totally dumbfounded.
"Curious... I didn't know you had a hearing problem."
Nero simply looked at him with wide eyes, opening and closing his mouth without really knowing what he should say.
"A-Are you... Uh... Are you some kind of... girl?" Nero stuttered, and Vergil noticed the way his ears turned pink and his face flushed, probably uncomfortable and embarrassed by the conclusion he had reached.
Cute. My cub is really cute.
Vergil smirked at Nero's reaction, and stared sharply at him as he raised his cup of coffee to his lips to take another sip.
"Do I look like a girl to you?" he calmly asked, humming.
Nero nervously rubbed his hand over his hair, messing it up.
"N-no, but-..."
"I am an omega, boy." Vergil replied, without blinking or looking ashamed.
No, he wasn't ashamed of being an omega, and he never would be. He just didn't like the codependency that being an omega forced him to have with other demons and humans, due to the recurring need for energy transference. Vergil despised feeling depend on others, because he had learned very early on that he can only trust himself to survive.
When he had previously spoken to Nero and Kyrie, he was reluctant to discuss this with them because he was not ready to answer questions regarding Nero's other father identity. However, it wasn't possible to hide his nature anymore: Dante's demon would be out of control soon, and it would be better for the young couple to know what was going on rather than to worry about the strange behavior that the twins would inevitably exhibit.
And about Nero's other parent... No one would force him to answer something he was not comfortable talking about, of course. Not even his cub. That was what Vergil was trying to convince himself: in truth, he was extremely afraid of Nero's reaction, but he wouldn't admit to himself his feelings and fears.
However, breaking all his expectations, Nero simply asked:
"Uh... What is an omega?"
Vergil sighed wearily, placing the cup on the tray and mentally cursing his brother. How did he expect Nero to receive any useful teaching from Dante?
"Nero, omegas are-..."
But before he could explain anything that would take away the look of confusion off Nero's face, they both heard a noisy crash and female screams downstairs.
Nero was faster: practically teleporting out of the room and shouting Kyrie's name at the top of his lungs. Vergil took a little longer to move due his dysmenorrhea, but soon appeared behind his cub, Yamato firmly on his hands, ready to defend his unborn kindred from any type of demonic attack that could made Kyrie scream like that. He peeked through the mezzanine as Nero ran down the stairs, and it wasn't long before he understood what was going on.
"DANTE! YOU PROMISED YOU'D CONTROL YOURSELF!" the blond Mundus' demon-puppet (or 'Trish', as Dante calls her) screamed at the top of her lungs, dodging a powerful blow from Dante, who was triggered and trying to strike Trish's head with his claws. He was demonstrating his lack of control by not using weapons to fight.
And that's not a good sign.
"DANTE!" Nero shouted as he quickly ran downstairs, using one of his spectral wings to strike Dante's back and force him away from Trish, knocking him to the ground. Kyrie, who until the moment was terrified watching the scene, hid herself behind Nero, who instinctively wrapped her with his other wing, "YOU HAVE LOST YOUR MIND, YOU IDIOT OLD MAN!?"
Dante whimpered like an injured dog and remained sprawled by the floor for a few seconds. Then he stood up and looked back at Trish with red eyes full of fury, opening and closing his claws as if he was ready to attack her again. Trish, evidently tired of Dante's uncontrolled demeanor, let electric blue sparkles appear between her fingers, ready to strike back as soon as Dante did something else.
Vergil, however, decided that now would be the right time to intervene.
"Alpha." He called in a strong commanding voice that could be heard even if he was still over the mezzanine, causing Dante to stop snarling and look up to him with interest, "Come."
Without paying any attention to the others present, Dante stretched his demonic wings and simply flew to the mezzanine, grabbing Vergil by the waist and pulling him into his room, smacking the door behind them witch such force that the walls shook on the first floor.
"What the fuck!?" Nero snarled, now listening to the noises and growls on the second floor. He didn't know if he should protect Vergil from Dante, since Dante really seemed out of control and Vergil was supposed to be 'sick'. He considered that his father was also a demon, and whatever was happening was something demonic so... he would know what to do, right?
Despite this logic, Nero's protective instinct over his idiot family was strong, so when he started taking the first quick strides toward the stairs, Trish had to grab him by the shoulder to make him stop.
"Don't." Trish warned, and Nero almost didn't hear her voice over the feral growl that came from upstairs, "Vergil knows what to do, let them work it together."
"What the hell is happening to these two idiots, Trish!?"
He was sure that Trish only was able to hear his question over the noise of breaking furniture because she was a demon. Kyrie, on the other hand, was really scared, trembling against his body while he and Trish tried to talk.
"Dante is feral and territorial, because of Vergil's heat. He promised he would not freak out when I arrived, but it is very difficult to control his demonic side. I knew he probably wouldn't be able to control himself, but I hoped that the fact that I am his friend would make things easier." She shook her head, her hair swinging behind her back graciously, "No such luck. But don't worry, Vergil will calm him down, and soon he will come with his tail between his legs to apologize to us."
"... Heat?" Kyrie timidly asked, still surprised by Dante's unpredictable outburst. Less than a minute ago the two of them were discussing amenities and talking about baby names (because Dante, for some reason, seemed to love giving absurd name suggestions, just to make Kyrie laugh), but the second Trish entered Devil May Cry and greeted him, Dante totally snapped.
"Oh hi, Kyrie!" Trish greeted her with a smile, tossing her blond hair back and placing her hand on her waist in a gesture of superiority that she always displayed in front of anyone. She didn't do it on purpose, Kyrie knew it was her demonic aura that made her act like that, so she just timidly smiled back and tried to suppress her shaking, "Dante gave me the great news, congratulations! And congratulations for you too, Nero!"
"OK, no, cut the crap already." Nero growled, taking a step to the front and pointing to the top floor at the same time a sound of glass shattering echoed, "I'm tired of them pretend that this is normal, and I will not accept that you do the same thing, Trish! Just... Fuck... Just explain to me what's going on!"
Trish tilted her head to the side, judging Nero's angry features and Kyrie's frightened look for a few seconds. It was obvious that the two dummies didn't explain things to the couple... What? Did she really expected that Vergil and Dante would do their family duties and teach Nero the basics?
After all, they're from Sparda family, and they simply don't know how to act like an ordinary family. Their patriarch, as incredible as he was as a warrior, sucked ass as a dad and didn't explain anything to Dante, so of course they would leave the poor lil'Nero in the dark. Typical.
"Since Dante and Vergil are too incompetent to open their mouths to talk (and not to snarl) for one minute, I will clarify this issue for you." she declared, walking towards the kitchen as if she owned the place, "Follow me, kids."
Nero felt an imminent fury in his chest and an intense urge to show his teeth to Trish, but he refrained himself. This was demon behavior, and he knew it. Trish walking around the place as if it was her territory made him nervous, but he wasn't going to attack her like Dante did. He wasn't that out of control, and in a way, he wasn't the actual owner of Devil May Cry. If Trish was offering answers, he would accept.
This time, in a much more effective and didactic way than before, he hoped.
(***)
When Dante regained consciousness, he was in his own bed, surrounded by blankets, clothes and Vergil's alluring scent. Vergil was purring beside him, wrapping his tail around him and resting his face in the crook of his neck; Dante was holding him loosely with his legs and wings. They were both partial triggered, but at least Dante wasn't in his full demon form.
To anyone, it would seem that the two slept side by side during the night, spooning in a sweet couple's embrace. However, as Dante lazily sat on the bed and escaped Vergil's gentle touch, Dante realized the damage: the bedroom was a completely utterly mess, since everything was broken or torn apart, including the damn bed (the twins were lying on the mattress that now touched the floor).
"No..." Vergil murmured, evolving his arms around Dante's shoulder and pushing him back to the bed, burring his face in Dante's neck once again, "You smell so good."
Vergil was clearly sleepy, because Dante was sure that he would never compliment him like that in his normal state.
"Verg, wake up." He whispered.
Vergil opened his eyes slowly, and Dante inspected his brother's look: Vergil's hair was messy and sweaty, and it stuck to his forehead and neck; he was still wearing pants, but the red coat and black t-shirt were torn and he was naked from the waist up; his lip had a small cut that seemed to heal quickly, and the side of his neck had dried blood smeared all over, as if he had been bitten several times in the same place; Vergil's pupils were blown, and Dante clearly felt an erection poke him on his thigh.
Oh, God, please have mercy.
"What happened?" Dante asked, flinching when he heard how raspy his voice was.
Vergil, however, seemed unfazed by his tone and kept purring softly as he answered.
"You lost control, little brother. I had to get you away from Nero and Trish before you destroyed the building. I suppose that I should feel blessed that I don't have the misfortune to be an alpha, like you brainless mutts are."
Vergil was extremely sassy that morning, and if Dante didn't know better, he would think that his brother was happy that alphas were fighting over him.
Smug bastard.
"I don't remember anything." Dante murmured, feeling an extreme headache appear out of nowhere while trying to access these memories, in vain.
"Really?"
Dante thought, and shook his head. He remembered seeing Trish entering Devil May Cry's building (she always had the key), and then his memories jump to the moment he woke up in the destroyed bed, sharing the mattress with his twin.
Vergil sighed, running a hand through his wet hair and pushing it back. The bangs didn't stay fixed, and soon went down to cover his forehead again, making him look younger than he is.
"Your demon didn't accept Trish's presence, since she isn't part of our family." He explained to Dante, snuggling closer to him as if it was a normal thing to do, "The territory issue was one of the variants, of course, but I think you lost control because of me."
Dante was surprised at Vergil's bold behavior, but his head was hurting so much and he felt at ease with the proximity. So he went with the flow, evolving his arms around Vergil and deciding to freak out later.
"She mentioned it could happen, but I thought she was overreacting."
Dante gently touched the skin on Vergil's neck that was stained by blood, trying to figure out if there were any bite marks. He was completely healed, though, and took the touch as a caress, purring louder.
"She understands that much more about demon dynamics than you, you should have listened to her. Did you called her to come here?" Dante hummed in affirmation, and Vergil let an annoyed growl escape his lips. "Foolishness. I don't understand the reason for that stupid idea, but her presence made you lost control, and I had to get you away from them as fast as I could. Kyrie was on the way, and the weak human didn't seem willing to run away from Nero."
"Are you saying that you protected Kyrie?" Dante hopefully asked.
"Don't be silly. I just protected my grandkid from dying even before it was born."
Dante, still frightened by the relationship as a whole, couldn't help but smile. Hearing Vergil call the baby 'grandkid' was extremely refreshing. His cold twin still has a heart somewhere.
"By any means, your demon accepted my call and nothing bad happened. But your demon wanted to mate me, Dante."
Dante let his smile slip and his eyes widen. He managed to remember briefly the sound of Vergil's voice calling him 'alpha' and the joy his inner demon felt when he was invited by an omega. The memory was just that, but it was enough to make him nervous and start hyperventilating.
"No way."
Now he understands what happened: Vergil's clothes were destroyed, torn to pieces; his brother had blood on his neck, and the bed was literally on the ground, with all its four legs broken. Oh shit. Did he... ?
This can't be happening!
Noticing Dante's sudden discomfort, Vergil turned on the bed and stared at him, finding Dante's frightened eyes and a regretful expression on his face.
"Don't look at me like that." Vergil rebuked, lifting his nose in a gesture of superiority that only him could do, "You have to understand, little brother, that you're no match for me. You are weaker than me. Your demon is unable to make me do something I didn't want to do."
What an asshole.
Dante should be mad at Vergil's cockiness, but that statement only made him thoughtful.
"You guarantee that I didn't take advantage of you, right Verg?" he asked, because he needed to be sure.
At that moment Vergil laughed, and Dante instinctively put his hand on his chest, for he was not prepared for the feeling of utter relief that invaded his heart. On the netherworld, Vergil implied that Mundus forced him to do it (raped him, if you ask Dante the correct term), and Dante was sure that he wouldn't forgive himself if he did the same thing.
Now that he was relieved, Dante could appreciate Vergil's laugh with ease. It was one of the most beautiful sounds he heard in his life, and he was unable to help but be ecstatic to hear.
"Nonsense." Vergil chucked, still smiling a little, "Obviously you did nothing. Don't get me wrong, we could have done everything your demon wanted." Vergil pressed his forehead to Dante's forehead, looking at him penetratingly with that air of seduction that only he was able to do; Dante gulped, "But I know you don't want it. Therefore, I prevented your demon from going further without your consent."
"But... the blood-...?"
"You just bit me." Vergil said, dismissively.
"The same way you did to me last night?"
Dante hasn't thought about it a lot, but it sure was strange. Vergil had bit him hard enough to make him bleed last night and he was sure that it's not something normal to do between humans. Vergil seemed a little uncomfortable by the question, but eventually responded with an affirmative nod.
"Don't worry about it."
Something about Vergil's tone didn't seem right, but Dante didn't want to force the truth out of him. Vergil had said that they hadn't done it and that he had managed to restrain him in some way, and that was all the reassurance he needed. Now that he was paying more attention, he noticed that Vergil's pants were intact, so he didn't take it out of him by force like he did with the t-shirt and coat. He didn't cross that line, thank God! Biting was strange, but Vergil had done the same to him the night before, so he could pretend that it was only a revenge act. Nothing unusual between brothers.
"I hate this demonic behavior thing."
"It has its advantages, little brother."
"I don't see any."
In that instant Vergil took him by surprise, forcing him against the bed and putting all his body weight over him. He pinned him with his legs and Dante instinctively moaned when he smelled Vergil's scent this close to his nose. Their chests were flushed, and Vergil inhaled nosily in Dante's ear, making his groin throb when his brother lewdly said:
"The day you let me show you, you will see how much advantage you can have, alpha."
As fast as he pinned him to the bed, Vergil stepped away, rising to his feet with a swift jump. He looked at the disapproving mess of clothes and broken furniture spread around them, and before Dante could get a hold of himself and subside his forming erection, Vergil totally broke the wanton atmosphere:
"You are going to clean up this mess." He ordered, leaving no room for objections.
Dante nearly let a distressed howl leave his throat.
"Not faiiirrr!" he whined, "I didn't do it alone."
"You destroyed my nest and interrupted my meal." Said Vergil, looking for another t-shirt to put on, "So I'll go downstairs, have a decent coffee with Nero, and when I'm upstairs again I want everything in place, the way it was before."
"You can't order me around, asshole!"
"Then I suppose I better make my nest somewhere else." He smugly said, already witnessing Dante's distressed pout, "Yeah, I thought so."
Not wanting to discuss any further, and knowing that Dante's jealousy would make him tidy up and leave the nest spotless once again (after all, Dante and his inner demon would never allow Vergil to spend his heat elsewhere), Vergil left the room gracefully, slamming the door lightly.
As he descended the stairs, Vergil was met with the expected look of disapproval. He knew that upon finding Trish, she would be able to perceive some things that Dante and Nero had not yet realized, but he certainly didn't think that this reunion would happen anytime soon, especially not while he was still in his heat. What was Dante thinking about, calling Trish during this time? Evidently, it would result in distress.
And, judging by the disapproving look of Trish's face, it would be much more than simply some distress.
Vergil instantly remembered Eva's disapproving look, and that memory made it difficult to maintain his superior posture. He looked away, briefly, because it was difficult to look into her green eyes, so similar to his mother's... But then his pride spoke louder and he stared back at her, reaching the bottom of the stairs and looking at her with his chin up.
"Demon."
"Nelo Angelo."
That was the greetings he received. He narrowed his eyes, clearly dissatisfied to be called by his slave name.
"Where's Nero and Kyrie?" he asked, not wanting to spend more time near the demon. He wanted to find his cub, they had things to talk about.
"They went shopping, they should be back soon." She responded, clearly hiding something from him.
He frowned.
"And for what reason I have the displeasure of having your company?"
"Dante called me, but usually I don't come running just because he wants my help." She answered, ignoring the offense for the moment, "I came to confirm something, Nelo Angelo. And apparently, I got all the confirmation I needed."
She approached him, her heels clicking nosily against the wooden floor. Vergil could still hear the movement upstairs, Dante was apparently arranging his nest as he had ordered, but Trish's proximity made him so uncomfortable that Vergil considered going back and help him tidy the room.
He was too proud to run away from her, though.
"What do you mean?" he asked, already knowing the answer, but afraid to reveal too much if she hadn't already read between the lines.
Trish was a smart demon, of course she could understand what was going on.
"Dante doesn't know. Isn't that right?"
And she didn't need to elaborate more than that. Vergil knew very well what she was talking about.
"No, he doesn't."
She narrowed her eyes at him.
"You have three days to tell him." she ordered, "You will reveal the truth to him in three days, or I will."
He considered killing her. It would be fast, easy and precise.
But then Dante dropped something from the floor above, and Vergil remembered why he shouldn't kill the damn Mundus' puppet. He didn't want to hurt Dante more than he already did, and killing Dante's close friend would sure make him suffer.
As he made this assumption, he just turned his back on the damn blond demon with an expression of extraordinary anger in his eyes, marching towards the kitchen and slamming the door behind himself. He needed chamomile tea, to help him with his anger.
Trish exhaled loudly, slightly surprised that Vergil had not stabbed her back with a spectral sword. Despite the surprise outcome, she knew the game she was playing with him: Vergil wouldn't kill her, because he didn't want to put another item on the list of things that Dante'd have to forgive him for.
Past Vergil wouldn't hesitate to kill her for threaten him, but now she was sure it wasn't the case anymore. Trish saw how Vergil called Dante into the bedroom, she felt the omega's fear when he gazed briefly at Kyrie's stomach before making the mate call. Vergil was an asshole, but now he longed for a family, even though he would never admit it. He wanted things to work out among Sparda's lineage, and he wanted to be by Dante's side while they watch Nero conquer new things in life and raise a new heir.
He wanted it. They all wanted it.
But Trish knew the Sparda boys were too stupid to do things right, so she decided there was no harm in giving them just a little push.
... To be continued...
Omegaverse observations so far:
Demons spawn only one demon per pregnancy. The twins were born in the same gestation and that was something atypical, but it was only possible because their mother was human.
Demons are either omegas or alphas, and this definition does not depend on the demon's gender (female, male or intersex). Regardless of their gender, omegas can become pregnant.
Alphas fight with each other for territories' domination and to court omegas. The omega's heat affects the alpha as well, causing these alphas to become especially energetic when they are close to omegas in heat, to protect them and supply them with energy.
Omegas, during their heat, lose a lot of energy and need physical contact from an alpha so that the two can balance their energy levels. The exchange of energies' speed are intensified with the carnal contact, but the corporal approach is enough for this exchange to slowly happen.
Omegas that cannot obtain the energy of others during their heat dies.
As a consequence of this energy's need for survival, omegas are able to charm humans so that they can obtain energy in the absence of alphas to supply this need. Such power apply only against humans, which created the legend of succubus and incubus in the human world. (Observation: that means Vergil was able to charm Dante in the cemetery scene because Dante is a hybrid, so hybrids are also susceptible to this power because they are part-human. He cannot enchant a pure demon, though).
Hybrids have dynamics slightly different from pure demons: they acquire their needs from the demonic nature after their first devil trigger. Dante, however, only started to feel the effects of his alpha side only after acquiring his sin devil trigger (at least that is what it seems up to that point in the fanfic). The reason for this and more details about the difference in puberty moments between the three hybrids will be clarified in future chapters.
In a demon pregnancy, the pregnant omega/human need to obtain energy by someone, usually his alpha mate, to generate a heathy cub. In case they don't get the energy, the omega/human will be weakened and the pregnancy may suffer some… complications.
Regardless of being an omega or alpha, a dying demon has two options: become a devil arm and submit his power to the one who conquered him or, if his will and pride is strong enough, be reborn in the Underworld, but in a weaker form without the power he previously possessed. This is what happened to Vergil after Dante killed him in his Nelo Angelo form.
Any doubts? Let me know!