A/N: Don't worry. An Arctic Trident will be updated tomorrow because I thought since I've already finished this chapter, let me just upload it and we'll upload the other chapter tomorrow.

A Day Later:

Kitsune Inn, Neo-Kyoto:

Isaiah's POV:

"Why is she here?" I asked in confusion as I pointed at the grinning Kunou, Asami shaking her head with an exasperated smile.

"You've already kissed her mother. Did you not think the daughter was going to be the same, Azathoth-sama?"

"I'm not kissing any kids nor am I marrying them because I saved their lives." I denied quickly, making her snort as Kunou blushed brightly.

"No! I'm here to thank you for saving my life!" She exclaimed quickly, making me raise an eyebrow before I turned to the smirking Asami.

"She wanted to thank her Devil in Shining Armour for saving her from doom." She clarified, making me hum in acknowledgement before I grinned at the pouting Kunou.

"No need to thank me. That was just my suppressed hero instincts that came out." I said, making her giggle in amusement.

"Well, thank you, Azathoth-sama's hero instincts."

"They say you're welcome." I played along with a smirk, making her burst out into giggles before I turned to the smiling Asami.

"So, why are you here? I thought you only had to escort me around the city?" I asked and she just shrugged.

"I'm just here to escort her."

"Along with the twenty other guards above and the who-knows-how-many hidden guards around us?" I asked with a smirk, making her smirk back as she nodded, Kunou grumbling under her breath as I noticed the Tengu flying above us as well as the hidden Youkai around us.

"Increased security just in case another incident happens?" I asked and smiled as they both nodded.

"That's good, but now, you two actually came to me at a great time. I was going out to the food stalls again. Want to come with?" I asked, grinning as Kunou nodded excitedly and Asami just sighed before she nodded.

"I've been tasked with taking care of Kunou, so I suppose I'll have to come with."

"You just like playing the miserable one." I said with a chuckle, closing the door behind me as Kunou giggled and she just groaned as we started walking towards the food district.

Later that day, Afternoon:

Kyoto Ramen Stall:

"Do you feel that?" I whispered to Asami and she had a serious look on her face as she nodded, Kunou looking at us in confusion as I glanced around.

Even the Tengu guards were tense as they glanced at the crowd around us from above, with me stretching my Air Current Sense as far as I could before my eyes widened and I stomped on the ground.

Runic patterns slithered out of my foot and spread out as far as I could, a pattern plitting off and latching onto whatever Youkai they could right before a monstrous explosion ripped through the food district.

Thankfully, I managed to teleport most of the Youkai out in time, but I couldn't save everyone as I heard the few Youkai I couldn't get out screaming in agony, the entirety of the food district ablaze as the Tengu floated down to stand besides us.

"Guardsmen! Evacuate all of the civilians around and near the food district to the shelters! The Yuki-Onna and Kappa clans will soon be here to take care of the blaze! Civilians, please keep calm and do not panic!" Yasaka barked out orders as she walked up to us, Tengu flying down from the skies in droves as they picked up civilians and quickly flew away to the south.

"Kunou! Listen to Kaa-san! Follow Asami to safety! Can you do that for me?" Kunou gave a shaky nod and Yasaka gave a soft smile before she gave her a kiss on the forehead and nodded at Asami, who nodded back before she swiftly picked up Kunou and bolted towards the shrine at the top of the mountains.

I also noticed the pack of kitsune priests and shrine maidens following after them from the rooftops and the shadows before Yasaka turned to me.

"I must say, I should be paying you for the amount of times you've been saving my people." She said with a smirk and I chuckled before we turned to the blazing fire in front of us, my eyes narrowing as I saw the two shadowy figures walking out of the flames.

"I told you the explosion would work better." A blue haired man dressed in a dark blue bodysuit said with a grin, my frown deepening as I felt the sinister demonic aura coming from his spear.

What the hell is that?

"Be quiet before I kill you." A beautiful woman, arguably as beautiful as Yasaka, said with a sneer, the man chuckling before I heard Yasaka's gasp, turning to see her staring in shock at the woman.

"You're supposed to be dead." She muttered and I turned back as the woman gave a sinister giggle before my eyes widened as nine crimson tails sprouted from her back.

"My death was…greatly exaggerated." The woman said before she turned to me, glancing me over and it felt dirty, for a lack of better words, as I slowly inched myself to hide slightly behind Yasaka.

"Looks like your little Devil playboy is scared of a real woman." She said with a smirk.

"More like scared of an old hag that probably has a droopy vagina." I countered, making Yasaka and the blue haired man burst out in laughter as the woman glared at us.

"…I'm going to kill you, painfully." She snarled and I just blew a raspberry at her, making her growl deepen before Yasaka spoke

. "Why are you here, Tamamo?"

"Wait, as in Tamamo-no-Mae?" I asked in surprise, making Yasaka nod as Tamamo huffed. I just stared at her before I spoke

"Huh, I thought you would be prettier. Guess you can't believe every rumour you hear."

"I will rip out your entrails and hang you with them!" Tamamo exclaimed in rage as black flames burst out of the ground behind her, with me yelping as I quickly hid behind Yasaka, who was too busy laughing her ass off as the blue-haired man stifled his laughter.

"Hahaha! Ahahahaha! You know what?! I might not just kill the devil now!" The man exclaimed as the woman turned her glare on him.

"Chulainn! Do as your leader has commanded and take care of your work!" The man just kept chuckling as he nodded, walking forward as I grinned at him.

"The name's Cú Chulainn, inheritor of the spirit of the Irish Hound Cú Chulainn. I'm here to just distract you while the ladies talk it out." He said with a grin and I shrugged as I walked out from behind Yasaka.

"The name's Isaiah Azathoth, devil of the Underworld. I'm just here for a vacation, but I guess I have to fight you now."

"Kill him!"

"Woman! Stop your screeching already and let me do my job!" Cú shouted back at her, making me snort as he let out a sigh before giving me an exasperated stare.

"So, how about we let the ladies deal with other and us two go and fight in another place?"

"Sure thing." I said with a shrug and he chuckled before he snapped his fingers, a large teleportation crest appearing under us two before we disappeared.

Outskirts of Kyoto, Japan:

Looking around at our battle ground, I narrowed my eyes slightly as I could still see smoke clouds to the far north, though it was just a small trail reaching up to the sky.

"So, why are you actually fighting me?" I asked Cú as I stretched my arms and he chuckled as he stretched his legs.

"Nothing much. Just my boss doesn't want to leave you alive with how quickly you've been growing in power." He said and I frowned as I created a rapier in my right hand, Holy energy surrounding it as I got into a fighting stance.

"What? Is he scared of my potential or something?"

"No, just the fact that a Devil, known for their laziness and arrogance, is actually trying to get even more power than necessary." He said and I rolled my eyes before I frowned.

"Huh, can I at least know the name of your boss?"

"Nope. Now, come on. Let's get this battle over with and I can go home."

"Do you actually think that you'll win?" I asked with a smirk before my eyes widened and I quickly twisted to the side while thrusting my rapier out in front of me, Cú reappearing in front of me with his spear piercing through the air where my head was while my rapier barely missed his chest.

"I don't know. Let's find out." And with that said, he quickly jumped back before lunging forward, his spear a blur as he stabbed at me at a blistering pace.

Storm King's Aura wrapped around my body as the rapier disappeared and was replaced by twin Holy falchions, my arms blurring as I parried and deflected every single one of his blows.

I don't know why, but my instincts were screaming at me to not let the spear get a single strike on me and I decided to trust them, flipping backwards as he spun and slashed out with his spear, cutting off a few blonde strands of hair.

I stumbled slightly as I felt a heavy migraine ripping through my head before I shook my head and I focused back on him, just in time to notice Cú in a throwing stance as he pulled his spear back before throwing it at me as hard as he could.

My eyes widened as I quickly activated Sandanzuki and my form blurred, leaning out of the way as the spear flew past me.

Even as it grazed me slightly on the shoulder, I stifled my scream and gritted my teeth as if felt as if my entire arm was ripped off my body, falling to the ground before I grunted as I rolled away from Cú stomping on the ground.

"Stings, doesn't it?" Cú said with a knowing smirk as he held his hand out to the side, the spear flying out of the ground and back into his grasp as he twirled it and got back into his stance.

'What the hell is that thing?'

"Don't let it hit you again. It hits on the metaphysical level, because it felt as if my arm was getting ripped off and your mindscape cracked before I repaired it." Mel spoke and my eyes widened at that before I dismissed my falchions, standing up and making sure my arm was still there before I focused on Cú.

'All out?'

"All out." A pillar of sparking blue lightning ripped through the air and into the sky, hurricane-level winds ripping across the grassy plains we were in as I stared at the slightly shocked Cú with shining blue eyes.

"Balance Break: Suzumebachi X Nozarashi."

3rd Person POV:

'What the hell is that?' Cú thought with a shocked gaze as he watched the lightning pillar shrink to cover Isaiah's form in the blink of an eye, his clothing disappearing as a bright blue toga wrapped around Isaiah's form. A crown made out of sparking blue wind sat snugly on top of Isaiah's head, his feet barren.

A jagged cleaver-like blade with a crimson hilt appeared in Isaiah's left hand and a black and gold gauntlet had formed on his right forearm, a stinger-like blade nearly triple the length of his fingers on his middle finger with a small black chain connecting it to the gauntlet.

The most surprising change were his eyes.

They were abyssal black pools with his pupils being bright blue stars, staring at Cú with confidence and a slight hint of arrogance as Isaiah let out a soft sigh before he grinned at him.

"Hey, where are we looking?" Cú's eyes widened as he heard Isaiah speak next to him, Isaiah giving him an amused smirk as Cú's head snapped to him before back at where he was standing, only to see nothing but air.

'I didn't even see him move.'

"I apologize for taking you lightly earlier and underestimating you. Allow me to rectify that." Cú's Touki exploded into existence and wrapped around him in the blink of an eye, giving him the chance to lean his head out of the way just in time as a black blur pierced the air where his head was.

"Nice moves." Isaiah said with a smirk before he grinned, spinning and jumping into the air as Cú pierced the air where he previously stood.

Cú gasped as a lightning-covered foot smashed into his chest, giving a silent scream as the shockwave and electricity raced through his body while he was sent barrelling head over heels.

Isaiah was not done as he appeared above his flying form, grinning widely as he raised the cleaver in his left hand before bringing it down and Cú barely stopped his flight as he pierced the ground with his spear and came to an abrupt stop.

He grunted as he heard his shoulder pop out before he popped it back in with ease, ripping his spear out of the ground and frowning as he saw the large crevice carved into the ground as Isaiah turned to him with a happy smile.

"You know, I was never able to test this new form because of how destructive it is, both to my enemy and to myself, so I have to thank you for being a test subject." Isaiah said with a smile as the cleaver in his left hand disappeared, the sparking electricity around Isaiah intensifying as he lowered himself into a crouch while pulling back his right hand.

Cú didn't say anything as he got into a horse stance, his spear gripped tightly at the top with his left and at the bottom with his right hand.

A tense silence reigned in the atmosphere as the two just stared at each other, neither daring to move before they both let out a soft breath and lunged forward.

Ten meters were crossed in a split second, a sparking blue lycan made out of lightning letting out a screeching howl appearing behind Isaiah and a howling crimson hound appearing behind Cú.

'Wail of the Crimson Monarch/ Sandanzuki- Piercing Fang: Dance of the Thunder God.' Cú and Isaiah muttered respectively and time slowed down as the two men appeared in front of each other.

Cú spun through the air before he stopped and slashed at Isaiah, who moved out of the way but not in time as the spear carved his left arm clean off at his shoulder

Not letting the pain stop him, he grunted and gritted his teeth before stabbing his right hand forward, Cú's eyes widening before he gave a defeated smirk as Isaiah's stinger-blade expanded in the blink of an eye and pierced right through the middle of his chest.

The two men gave each other one final smile and nod of acknowledgement before Isaiah raised his hand and brought it back down just as quickly, Cú Chulainn's body sliced cleanly in half from head to toe as he skidded past the two halves of the corpses.

Isaiah slowly turned as the aura and his glove disappeared, falling to his knees from the exhaustion and the pain of his left arm gone, but he forced himself to his feet as he stared at the corpse of Cú Chulainn, raising his right fist and placing it against his chest while nodding his head.

'Rest in peace, Hound of Ireland.' He prayed, feeling a slight sting from the headache caused by his praying before he fell to the ground with a sigh, runes crawling across his body and cutting off the blood flow to his arm.

"Damn…that was one hell of a fight."

"Nice work." Mel said with a happy tone and Isaiah chuckled before he forced himself to sit upright, picking up his arm off the ground and praying that Yasaka had a way to attach arms or else, he's going to need a lot of excuses for the girls.

Placing it in his pocket dimension, he glanced back at Cú'd corpse and sighed as a runic pattern spread across the ground and towards the two halves, setting both ablaze in bright blue flames as he reached for the spear and picked it up.

"And now we have Gáe Bulg as a trophy of your victory." Mel said and his eyes widened.

"That's what I forgot! I knew I recognized this spear somehow!" Isaiah exclaimed, hearing Mel's laughter in the back of his mind as he twisted and turned the spear before he also put it in a pocket dimension.

'I wonder if Tsubaki would like this as her first gift as my girlfriend.'Isaiah thought with a smirk before he sighed as he remembered that the other two would get jealous, which means…

"Now time to get back to Kyoto and go check if they have any jewelry or kimonos for all three." Isaiah muttered as he used a bit of what little energy he had left to create a teleportation crest under him, giving one final glance at where Cú's corpse last was before he disappeared.

Outskirts of Neo-Kyoto's Food District, Neo-Kyoto:

Isaiah's POV:

As I reappeared at the last location where Yasaka was, I gave a low whistle at the destruction around me.

The entirety of the food district had completely burned around and was nothing but a large crater, black and blue flames surrounding the area with craters and crevices scattered everywhere.

All around the crater were Youkai, a few looking worried but most of them were smiling and cheering before I glanced at the crater and chuckled.

Lying at the bottom was the corpse of Tamamo, her eyes closed and a, dare-I-say, beautiful smile on her face as a gaping hole was in the middle of her chest. Standing above the corpse of Tamamo was Yasaka, grasping her right arm with her left as her nine golden tails swayed through the air. Grasped in her bloody right hand was a dark green mirror, the glass an abyssal black with a pulsing crimson heart in the middle of the mirror and two ornate fox heads at the top and bottom of the mirror.

"Azathoth-sama! You won!" A inugami who noticed me exclaimed, a few of the Youkai close to him turning around before their eyes widened as they noticed my missing left arm.

"Don't worry about that. It's just a scratch." I said with a smile and they all nodded, walking past them before I chuckled as I heard the whisper of the aforementioned inugami.

"He's so damn cool." Arriving at the bottom of the crater, Yasaka turned her head to face me before we smiled at each other, with her glancing at my missing arm before shaking her head.

"I swear, Azathoth-dono, you are really making it hard for me to pay you back for your troubles."

"Eh, we'll just leave it as IOU's." I said with a smirk, making her giggle before she sighed softly as she turned back to Tamamo.

"I just wish I didn't have to kill my own blood."

"Wait, you're related?" I asked in surprise and she giggled as she nodded.

"My great-great-great-great-grandmother. We kitsunes like to mate…a lot." She clarified with a blush as I gave her a stare before I shook my head.

"I guess I should have expected that." I said with a smirk, making her giggle before she waved her hand, the black flames around us disappeared as the blue flames flew through the air and wrapped around Tamamo's form. Not a single inch of her skin was burned as Yasaka raised Tamamo's corpse into the air and we walked out of the crater.

"So, how about we get that peace-treaty over and done with?" She asked and I chuckled as I nodded, chuckling with her as we heard the crowd finally cheered loudly.

Two Days Later:

Kyoto Metro, Kyoto:

"Are you sure your arm is alright?" Kunou asked and I chuckled as I nodded, glancing at my left arm that was now attached to my shoulder thanks to some runes and a bit of healing from Yasaka.

Thankfully, we managed to reattach it, but it was still a bit numb and I can't grip things as tightly as I could before. I guess if a Phenex tear doesn't help, then I can adjust my fighting style a bit.

"My arm is okay, Kunou. You don't have to keep worrying about it." I said with a soft smile, chuckling as she just blushed and huffed before I turned to the amused Yasaka and Asami.

"Asami, I must thank you for the wondrous experience in Kyoto as well as your guidance."

"It was my pleasure, Azathoth-sama."

"…You're never going to call me just Isaiah, aren't you?"

"Nope." She said with a grin and I just groaned before I shook my head, turning to Yasaka.

"No kisses, right?" I asked as I leaned back slightly, making Kunou and Asami giggle as Yasaka rolled her eyes.

"No, no kisses, which I don't understand. Am I just not pretty enough?"

"No, it's just I have three girlfriends that would rip me in half if they heard that I was kissing other women."

"Oh~ A harem? I wonder if I can join."

"Kaa-san!" Kunou exclaimed in shock, Asami just shaking her head as Yasaka giggled and I sighed.

"Just kidding, Kunou-chan…or am I?" She muttered with a seductive smile aimed at me and fearing for my genitals, I quickly said goodbye.

"Ah, the train is leaving, so I must be saying goodbye. Kunou, Asami, Yasaka, it was lovely to meet you three and I wish nothing but the best in your future."

"To you as well and do remember that my bed is always open! It does get lonely at night!"

"Kaa-san!" Thank the Satans I applied an illusion rune around us or else, that would have been very embarrasing.

Giving one final glance at the trio, with Asami giving me an exasperated stare as Kunou chastised the cackling Yasaka, I smiled before walking onto the train just as its doors shut behind me. Here's to hoping the girls don't notice the arm.

Ah, who am I kidding? They'd notice it the second I take off my shirt.

Azathoth Manor, Kuoh Town:

"Finally. Home sweet home." I muttered as I reappeared from my teleportation crest after deciding to just teleport back home from the station instead of walking.

Sighing as I felt my left shoulder ache again, I shook my head before walking towards the mansion before I stopped in my tracks as I finally noticed the groups of guardsmen standing around me with more in the sky.

"Okay, what the hell is going on?" I groaned as I stared at their serious faces as they all stared at me before one of them spoke.

"Halt! State your name and age!" He barked, the others gripping their bidents tightly as I raised an eyebrow.

"I could ask you the same thing, with how you all are standing in my yard and in front of my house."

"Name and age!" The guardsman barked, though this time a few of them had lowered their bidents at me and pointed the tips at me, a few of the guardsmen floating in the air noticing the commotion as they slowly floated closer.

"The name's Isaiah Azathoth, age 16. Now are you going to tell me why the hell you're in front of my house?" The guardsmen didn't say anything as they all went back to neutral stances and nodded, with the one who spoke gesturing for me to walk forward.

Activating Air Current Sense and Electroception, I groaned as I felt Sirzechs, Zeoticus, Rias, Sona and their peerages along with mine sitting in the living room before I shook my head and walked towards the door.

Opening it, I took my coat off and shoes off, placing my shoes at the front and hanging my coat on the coat rack before I started walking towards the living room.

"Ah, the man who we've been waiting for!" Sirzechs exclaimed with a smile as I walked in the room, giving a quick glance at the scar on my left arm before he smiled and stared at me.

"What happened to your shoulder?!" Unfortunately, I forgot that Rias was the most vocal of the two siblings, drawing Kuroka's, Akeno's and Tsubaki's attention to the scar as their eyes widened and they quickly rushed towards me.

"It was cut off in a fight against Cú Chulainn when he and Tamamo-no-Mae attacked Neo-Kyoto, but thankfully, Yasaka had a few healing methods to attach it back. I'm fine." I said softly to the trio who were giving me concerned stares before Kuroka and Tsubaki sighed in slight relief, Akeno staring into my eyes and smiling as she nodded and gave me a quick kiss.

"Ah, to be young and in love! Such a wondrous time." Zeoticus said with a smile, making the three girls blush slightly as I chuckled.

"So, why is everyone here?" I asked and they all sighed as Sirzechs pinched the bridge of his nose.

"Well, you're gonna want to sit down for this one." He muttered and confused, I sat down next to Gasper and Koneko, chuckling as Gasper poked at my scar with a look of awe before grumbling softly as Koneko slapped his hand away.

"So, what's the problem?"

"Bedeze Abaddon, the former No.3 in the Rating Game, and his peerage has been declared Stray Devils after massacring the Great House Bael." My eyes widened in shock as I stared at Sirzechs, glancing at Zeoticus, who just sighed and nodded at me.

"What about Sairaorg?" I asked and he smiled.

"Thankfully, Sairaorg, his peerage, his mother, Lady Elise and her son Magdaren along with their respective peerages were able to escape to the Gremory Castle, though Sairaorg and his peerage did sustain injuries while they protected everyone else. It was not serious injuries, though." Sirzechs quickly clarified as I grew concerned about the injuries before I smiled as relief flew through my body.

"Then what's with the guardsmen? And why is everyone here?" I asked and he sighed.

"That's where the problem comes in. After killing Zekram, Bedeze declared to the Underworld that since you were the one who took away his fame and power, he's going to come and kill you and nothing will stop him from doing so, hence the guardsmen. Also, we don't know if he would target you by using anyone here against you, therefore, as of tomorrow, you, Rias and Sona along with your peerages will be living in this mansion for the foreseeable future. At least, until this issue has been taking care of."

"…So what you're saying is that I have to watch out for more assassins?" I asked and he gave a wry smile as he nodded, making me sigh as I shook my head before I nodded.

"Fine, I'll make sure to be careful. Meredith?" I asked and she smiled as she nodded.

"I've already created sensing and security spells around the mansion, but I'll make sure to place more around town." I smiled as I nodded before I turned as Sirzechs and Zeoticus stood up.

"Well then! That's our work done. Make sure to all live cordially together and don't kill each other on the first day."

"I'll try not to." Sona muttered with a smile, making Rias pout as we all chuckled before the two men disappeared

. "I'm far too tired from my trip, so I'll be seeing you tomorrow, but before I forget." I muttered as I reached into my pocket dimension and pulled out Gáe Bulg, everyone looking wary at the sinister aura it was radiating before I handed it to a confused Tsubaki.

"That's Gáe Bulg. I'm not much of a spearman and I use my Sacred Gears to fight, so that would fit you better than it would fit me." I said with a smile, chuckling at her look of shock along with that of everyone before I groaned as I stretched and started walking to my room.

"H-H-Hey! What about me? I'm your first girlfriend! Don't I get anything as cool?" Akeno asked and I chuckled as I walked towards my room.

"I'll give you your gifts when I wake up." I said with a smile and she pouted before she grinned mischievously as she walked after me.

"What? Since we're living here now, I get to sleep with you as much as I want."

"And us too!" Kuroka and Tsubaki exclaimed as they rushed after us, Tsubaki putting her spear away as I just sighed and nodded.

Well, there goes all of my alone time.

It was nice knowing you, Isa-time.

A/N: And there we go! An arc done and the next to go!

This story has been really fun to write and I thank you guys for letting me write this.

Anyway, the new Storm form is something that some will remember if they remember the three tomes Sirzechs gave Isaiah at the first half of this fanfic.

Also, Isaiah losing his arm was me showing that he won't walk away from everything with just exhaustion. It also foreshadows a little something in the future.

What that is?

Who knows?

Anyway, as always, read, enjoy, review and until the next one…

Ba-Bye~!