When Eddie said he didn't like his teddy you knew he was a no-good kid.
Frank: Omi
Brad: Inui (confirmed in game)
Janet: Momoko, oh yeah, baby (confirmed in game)
Riff Raff: open (possibly Soushi)
Magenta: Mizuki (confirmed in game)
Columbia: Excel (confirmed in game)
Rocky: Rey (confirmed in game, thank you Mizuki-kun)
Eddie: Open (possibly IlPala)
Dr. Scott: Open
Criminologist: Hatsuharu
We can double-book too, if we need to, I seriously don't care. Omi's mostly gotten stuff from the underwear tree, so anyone with a mostly-lingerie costume is even freer to double-book. XD