Previously: Dr. Alphys felt better after telling Cali about her experiment gone wrong and they talk about what they need to do next...at some point. Meanwhile Deos, Frisk, Toriel and Flowey encounter Undyne, Captain of the Royal Guard on the wooden walkway that was separated by a large body of water, Deos tried to talk his way past Undyne, unfortunately she responded by jumping at him and cracking his ribs. Before she could pursue Frisk and Flowey, Deos powered-up using his determination to protect Frisk and the rage he was feeling due to a combination of his injury and Undyne's poor diplomatic skills, as a consequence, she faces Deos the Determined...much to her pleasure...
(Waterfall)
Undyne was facing Deos the Determined, an armored muscular form of Deos fuelled by his own determination and he was NOT pleased with Undyne.
"Special delivery of PAIN for Captain Undyne!" Deos the Determined shouted.
"Dr. Alphys said that humans were determined, but I didn't think that they were THIS determined! NGAAAAAHHHHHHHHHHHHHHHHH!" Undyne shouted happily, as she charged at Deos the Determined.
Deos the Determined parried her attack and then threw her to where they just were, this surprised him as he didn't realise he was that strong now, he heard a crash when Undyne collided with a wall, then she jumped forward to get back to him and fired a volley of magic spear constructs in mid-air, he countered with a wave of red magic that destroyed them and once she landed, she tried to use the same trick twice and punch him in the ribs, he caught her hand this time and hit her with his red mace construct, it only lightly bruised her and she winced at the pain.
"Finally! A worthy opponent!" Undyne shouted with delight.
"Is this a GAME to you?!" Deos the Determined shouted with rage in his voice as he fought against her in melee combat "Who made you the sole arbiter of right and wrong in the underground?! Even some humans aren't that bad against each other!"
"So, when humans sealed us down here, they turned on each other?" Undyne asked.
"Yeah, how bad must your reasons have to be for theirs to be more justifyable?!" Said Deos the Determined.
"Well...your power just gave me a reason to not hold back!" Undyne shouted.
"Says the one who provoked me by attacking a pacifist child! For a woman of justice, that's one of the more unjust acts I could think of!" Deos the Determined said as he exploited her moment of weakness, a hint of uncertainty caused by his words, he made two red mace constructs smash into her sides, this was especially painful. "Is Asgore the kind that would approve of you attacking a child, do you think that he'd be proud of you?!" He made a red mace construct attack her from below, stunning her. "No, I don't think he would! It would drive an already broken man over the edge! Do you even think that most humans are aware of the existence of monsters down here?! Well, I have news for you, Undyne! Your kind is a half-forgotten legend, something to frighten children long after the true reason was lost, the same legend that kept anyone from climbing this mountain, well...almost no-one."
"He has six human souls, he just needs one more! It can either be from you or that child that ran away, personally...I feel better about killing you because you at least fight back" Undyne shouted, Deos the Determined was able to dodge, parry and block most of them.
"I know all too well about them, by the time I found out about them, the damage was done, there is another way, no more humans have to die." Deos the Determined said as he is struggling to keep up the defence.
"Whatever, it's no deal! This only ends one of two ways: My death or yours and as long as I'm not dust, I'll make sure that it's yours!" Undyne charges at him and he then create a ring of fire around them, just above the walkway to not set it on fire, this was making her feel hot, due to her armor.
"I'm done humoring you, Undyne!" shouted Deos the Determined, she tried leaping away, but he created a red mace construct to pound her back to the ground "Oh no, you don't! You started this fight, so you should face the consequences of them!"
"Ugh...so...hot." Undyne grunted as the heat, partly caused by her armor, caused her to pass out, satisfied that she's incapacitated, he made the ring of fire disappear and it started to become cooler, he then went back to normal as Frisk and Flowey came out of hiding, Frisk was bizzarely relived to see that Undyne was still alive, Flowey looked disappointed.
"No! Why didn't you fish her off?!" Flowey screamed.
"Killing her would only confirm their worst fears about humans, besides it would break Dr. Alphys' heart. It also wouldn't improve anything in the underground, because...she'd be dead." Deos said with a serious look on his face. He handed Frisk some bottled water, they picked it up and knew what to do with it, they poured some of it into Undyne's mouth, which revived her. They moved back to where Deos and Flowey were as she got herself up, she seemed surprised that he didn't kill her. "I want you to look at the child that you tried to skewer, they've already experienced a lot of bad things, watching their parents get killed by a negligent drunk driver and after that being bullied by some of the other children for being ambiguous in appearance as far as gender is concerned, so they DON'T need any more grief, least at all from you!...and just in case you don't get the message, I know someone who will hammer that message into your thick-scaled head to make sure that you won't easily forget!" These last few words had a grave tone that implied to Undyne that their fight was "easy mode" comapred to what is about to happen, it was then that Toriel appeared out of the Dimensional Pocket Amulet and she was not pleased with Undyne, Undyne was terrified...she knew EXACTLY who she was dealing with and she knew that it was pointless to even try and get though her.
"I see that you know who I am and..." she looked at Deos "although I might find Deos' methods to be excessive, I admit that I would've been that aggressive towards you as well" she then looked at Undyne, while keeping Frisk close "Any further aggressive action towards my child will be dealt with by me personally and as you could tell from the magic that he borrowed, it is enough to deal with you, quite easily!" her eyes narrowed before she spoke next "Am I understood?..."
"Y-yes" Undyne spoke with her voice breaking.
"I hope that was, she's much less forgiving and that's considering how long she's been absent from the affairs of her people." Deos said.
"Yes...I have been negligent" Toriel closed her eyes briefly, they were heavy with regret and then opened them slower "...but no longer, I intend to deal with Asgore personally."
"Is there anything that I can do, Queen Toriel?" Undyne asked, a little calmer than previously, but still quite scarred.
"Firstly, please don't call me Queen, I abdicated long ago. Secondly, do not tell Asgore that I'm coming, I intend to go to the Capital, but on my own terms." Toriel said with a tone of authority.
"There's something that we want to talk to you about, but not here. It can wait until we get to the part of Waterfall where you live, can you meet us there?" Deos asked.
"Sure, you actually gave me the best fight I've had since joining the Royal Guard!" Undyne said as she walked away, along the path that they're going to follow.
Deos paused to think about what has happened "I think that went quite well, although...let's hope that I don't have to do that again, it doesn't exactly bring out the best in me, does it?"
"No, it doesn't..." Toriel said as she re-entered the Dimensional Pocket Amulet, Frisk nodded in agreement, Flowey rolled his eyes at this.
(Deos' Apartment)
"Alphys, calm down! What was it that freaked you out like this?" Cali asked, she had found out that Deos beat Undyne using pyromancy that she didn't know that he had and then something happened that make Dr. Alphys stop the commentary, she finally calmed down.
"IT'S THE QUEEN, SHE WAS WITH THEM THIS WHOLE TIME!" She shouted.
"Whoh, did you say that Queen Toriel is out of hiding, she's not dead?! No wonder you freaked out." Cali said, with some surprise, this was a new development...from what she knew, Toriel left Asgore and went into hiding after both of their children died on the same day and he declared war with humanity out of anger and grief. "I'm guessing she had a good reason to come out of hiding, if she's...Deos! He must've persuaded her somehow."
"S-she's also close to Frisk, judging from h-how she k-kept them close when t-talking to U-Undyne. She s-seems more scared of her t-than she was of Deos" Dr. Alphys said.
"Yeah, there are few who would risk provoking a maternally outraged boss monster who has lost much, I'm guessing that Deos talked her into leaving rather than fight her." Cali said with a smile on her face, thinking about how he wasn't that eager to use violence.
"T-That would probably be s-safer." Said Dr. Alphys.
"I'm guessing that Undyne will be leaving them alone from now on, she knows that Deos can handle her now and she also knows that Toriel will be there as well, I don't know what Deos has planned, but we know that it involves her." Cali said, although she still some anger in her about what Deos has done, it appears to have had a positive effect on the underground, not one monster was killed and relations are starting to improve, even with one of the more difficult monsters...she then continued to hear from Dr. Alphys on their progress.
Undyne might not be hostile to either of the humans now, but what about the rest of Waterfall? What else will be revealed as they continue their journey? Find out in Chapter 14: Shoes of the Marsh