There are four of them. The first is Shuji Ikutsuki. [His voice is mostly level, but it's easy enough to tell Minato actually hates that man.] He was the chairman of SEES, until he betrayed and tried to kill us. You'll know him by his bad jokes.

Then there's Strega, a trio of artificial Persona-users who opposed us. The leader, Takaya, is insane. Looks kind of pale and ghostly, never wears a shirt or shoes. Jin's loyal to him, kind of a nerdy guy, carries a silver briefcase full of explosives. The third member, Chidori, is...iffy. White gothic lolita clothing. I'm not sure I'd call her an enemy, depending when she comes from, but be wary.

You won't need to worry about them back home. They're all dead.