[FairyKing]

I haven't seen Kuuga (I want to, just haven't yet), but from what I've heard about it, I think it could be interesting to have Baron as the second rider. With Kaito's ambition and belief that only the strongest survive, I see him being a human who somehow enters the Gurongi's game, only instead of attacking humans he aims to win by eliminating all the other contestants. This gives him a shared enemy with Yusuke but a completely different motivation, so they would fight together but have conflict between them.