Itsuki, Distressed Lover and Unity/Wicked Influence Question

You're partially right. You need Team Sensui bonus to trigger Itsuki's effect. Once triggered, all your opponent's characters are both Heroes and Villains for your card effects. Now, if you were to play 1 Wicked Influence or 1 Unity, you would select the team symbol of your choice on a character in play and all other team symbols vanish and all villains or heroes would gain that team symbol (your opponent would guarantee gain the bonus). Now, if your team is also all heroes and villains, you would also gain the team symbol and thus the team bonus if you qualify. You would lose the Sensui Team Bonus at this point since all symbols were wiped out. If you try to play another Wicked Influence or Unity, you would be stuck unless you had a character that didn't meet the previous cards requirements to work with since all heroes or villains would have lost all other team symbols. If everyone were heroes/villains when you did played Unity/WI the first time, that's the only symbol that would remain in play. You'd get put into a loop of never gaining a new symbol b/c the 1st card wiped out all other symbols for the match.

An Uncontrollable Power would remedy this situation if you wanted to flip team symbols later and had other options.

Hope this makes sense!