My roster fighting to the death, huh... This is actually a pretty hard answer.

Going by the numbers, Frisk is basically impossible to beat in any given scenario where they have access to DT. However, that's boring, so let's say they're CRAU!Frisk and can't infinitely rez themself.

Same goes for Tyzias, although let's take her from pre-GT fuckening so things are fair for everyone involved.

As far as characters who are highly dependent on allies go, I'm going to say Ritsuka has the old standbys of Dantes and Musashi with her.

With that out of the way, let's go down the bracket.

>Sherry LeBlanc is an impressive hand-to-hand combatant, but she just can't hold a candle to most of my roster in terms of durability and narratively she jobs all the time.

>Lydia, on seeing how massively, vastly outmatched she is, takes a gamble and calls forth Beetlejuice. It works, and she escapes in the general chaos, but a few of my other muses (namely CRAU!Tyzias and potentially Momoe) could have the ability to exorcise him so it'll count as Lydia's loss. Beetlejuice would be the big contender early on, though.

>Wester is three times as strong and fast as a normal human and has a large arsenal of duel monsters to contend with, and their Shadow Games would be a massive pain, but the best they could do is stall out until someone gets their hands on the duel disk and shuts it down, then they're KO'd. I think that honor goes to Kyrie.

>Speaking of, Kyrie would last a surprisingly long time because she is WELL aware she is not equipped to take on any of these bozos even under the assumption she can use the Winchester. I think she hides it out and picks off easy targets like Wester and Sherry, tries to go in for the kill at the last person standing, and gets utterly blow away. Good effort.

>Lake has sheer, raw durability and absolutely nothing else going for her, but stuff like the Sander does have the potential to kill her and Ryuko in particular can spindash with enough velocity to take her out. She puts up a damn good fight, though, and breaks a few bones on her way out.

Now we're at the heavy hitters. This is where things get hard.

...wait, no, not yet.

>Momoe is another case of "good fighter, not enough durability..." kinda. She doesn't have any special abilities to speak of other than dream regeneration, incredible strength, and a lower gravity threshold, but even working on the assumption she can regenerate infinitely she has two weak points that can be exploited and she's toast when she wakes up.

NOW we're at the heavy hitters.

>Nyalexis is stupid fast, has good instincts, has ice and shadow magic, and even a version of the Gae Bolg, but what it ultimately comes down to is her just not being durable enough. I think she skirmishes around the battlefield until CRAU!IF!Frisk finally locks her down. She's on their level in terms of speed, but they have time and healing magic.

That match goes to Frisk.

It's going to end in a four-way showdown between Ritsuka's team (who recruited Mordred in the midst of the chaos), Ryuko, CRAU!Tyzias, and CRAU!Frisk.

The angry assholes go at each other first. If Ritsuka gets servants, Ryuko gets Senketsu, so I think this match goes to Ryuko after a long fight between her and Mo with several close calls. Again, even with high rank instinct Mordred can't match Ryuko at her fastest, and Ryuko has a lot of tricks up her sleeves or lack thereof.

Dantes vs. Frisk is up next, and this one is a lot harder to figure out... primarily because this is another NO FRISK HE HAS A CONDITION situation. Dantes can break the prison of time and space. Frisk has a bunch of their own time-space fuckery up their sleeve. I think they end up in mutual annihilation after breaking reality a few too many times.

Which leaves Musashi vs. Tyzias, which is another hard one. Musashi is an unbeatable opponent as long as a single possibility for her victory exists, and as varied as Tyzias's abilities are in her Melodies CRAU she just can't top Musashi's swordsmanship, so that match goes to Musashi.

Top of the bracket is Musashi vs. Ryuko. Ryuko, as inhuman as her abilities are, is a really sloppy fighter in a lot of cases so Musashi could definitely use the Empyrean Eye to find one possible victory at least... but Ryuko has a tendency for DO THE IMPOSSIBLE SEE THE INVISIBLE ROW ROW FIGHT THE POWER TOUCH THE UNTOUCHABLE BREAK THE UNBREAKABLE-

Which means that Ryuko would be able to break through even "zero" through sheer tenacity and refusal to give up, and after that Ritsuka is a pretty easy target.

So the battle royale crown goes to Ryuko.

OH FUCK I FORGOT CONNIE

she falls in the same category as sherry as in "good fighter, ultimately still just a human and will eat absolute shit to all of the people on my muse list"

Are there any disputes?

holy heck this is so thought out...

I would like to say in the edge case where Ritsuka's squad wins over Ryuko, Kyrie WOULD pull out the win here.

Because, again. Ritsuka is a human. Durable as she is, fill her with enough bullets and total organ failure has got to happen EVENTUALLY.