Blitzwing possibly has dissociative identity disorder, the identities being Icy who is the dominant personality, then Hothead who's more violent, and lastly Random who's insane.
He is mainly Icy, being cold, calm, calculating, quietly disdained with a monocle, and honest.
He has mood swings and a size kink.
He can be loyal unless given good reason. He's unpredictable, obsessive, possessive, and a cannibal. He is a Cybertronian who was experimented on by Blackarachnia.