ok so i'm either very sleep deprived or really high on soda but this is my theory on how the ada will get rid of fukuchi (hopefully)
(also this is just for fun there's like no way this will actually happen it's just how I cope)
so let me pull an endgame here and say they time travel
for me there's only 2 reasonable ways for them to have an actual fight with fukuchi in which it wouldn't be just him kicking their asses like he did to sskk: to either get one order first (which already went down the drain basically) or to have him fight with someone equal as him
and after some thinking (mainly just shower thoughts) my best pick would be odasaku since their abilities are very similar, only difference being that fukuchi needs that way overpowered sword of his.
oh but tumblr user bbydonthurtme, oda is dead !!! he can't fight fukuchi !!!
and to that I say bullSHIT asagiri gave us beast for a reason !!! not just for the depression !!!
ok so in beast dazai says that he used the book to find a reality in which oda was still alive, so he basically just straight up hopped through dimensions asking "oda are you /srs or /j?" and that is extremely important
because not only do we find out that they can go through different dimensions using the book, we also know that there are a TON of different odas that could be our potential guinea pigs
(and no I'm not saying that they're gonna make a army of odas but ngl that would be cool)
RIGHT so the plan is simple: get the page and get the bram
yeah it's not that simple but its gonna have to happen eventually so let's pretend they already got it, they already have bram on their side basically right (as hostage but still)
what I'm thinking is: they use the page to go to the nearest dimension in which oda just died. they bring bram stoker along and he turns that oda into a vampire (since we saw with akutagawa that vampires can still use their abilities it would work)
that would potentially let them ignore the rule that oda and dazai can't live together in the same dimensions since that oda is technically dead so.... boom
so they make fukuchi and vampire!oda fight and that could have 3 possible outcomes:
1- they both die
2- one of them dies (and everything goes to sh1t)
3- oda doesn't win but still manages to take the sword away from fukuchi which leaves him vulnerable (and I beg you atsushi please behead that rat as soon as you get the chance)
then if we ignore outcome 2 everything would be alright and colorfull and happy until we have to worry about the one and only agatha christie and maybe fyodor again