This is the part where I throw down my (invisible) hat in disgust.
Lousy stinkin' Japaneses! This entire series of pictures is a Missed Moments of Awesome trope! They flat out REFUSE to do anything awesome with crossover, instead they waste time making insipid and shallow lovey-dovey crap, like the Mary SueMarty Stu Buront crap.
That's it! It's time I take this matter into my own hands...
'Loli Loli Team' A pretty famous mugen pair in japanese community, Axl has a move where he says "norinori daze", which can be misheard as "rorirori daze", suika is one of the most loli characters on mugen and thus, the pairing.
Yes it could be any other loli, but whoever came with the team first choose Suika as Axl partner.