[Void]Aichi vs. Sera imeejis/speculation
1) Aichi wins.
Despite being himself for now, Aichi doesn't have his Liberators and finds himself forced to use his Link Joker deck in the hopes of stopping Sera, even if there's a risk about what the result might do to him. Whether because Link Joker seems to flare and try to take control of him when he wins (as it did against Neve) and/or he can't stop it, Aichi Reverses Sera, leading to the LJSera vs. Gaillard.
2) VoidAichi wins.
Even if he starts the fight of as himself, Aichi simply can't fend off Link Joker, given the incredible strain it puts on his body and is swallowed up by its power again. In this state, he brutally clashes with Sera the same way he did Neve. Perhaps surfacing if Kourin and Neve urge him back, though equally possibly that he's too smothered to surface. Without sympathy, VoidAichi Reverses Sera without a second thought, as he's no plans to hold back, even if there's no clear direction to his movements.
3) Sera wins.
Whether Aichi is himself or Link Joker, Sera's able to launch a successful attack that overwhelms him, whether it be because he's too busy trying to regain control of himself or any other devious plan that Sera might have in mind.
a) As he's lost to Link Joker, Sera may Reverse Aichi (or at least deepen Link Joker's roots in him) in the case that Sera intends to use Aichi as a puppet.
b) Having beaten the seed's current carrier, Sera inherits it from Aichi, who's body suffers for having lost so much strength, perhaps putting his life in jeopardy once again.
c) Sera inflicts Judgement on Aichi, which grinds him down and removes him as a threat to the plan. Which further fuels Gaillard's need to fight him.
Kai-kun, Naoki-kun, Gaillard, Ren and Leon arrive just as the conclusion of the fight is played out, finding themselves happening upon Reverse/Void Aichi, LJSera and/or a severely weakened, maybe even unconscious, Aichi.