Romeo is known to be outgoing and talkative so he isn't afraid to speak his mind. He does come off as intimidating or emotionless at times because of his mask or the cold stares he gives at first meetings. But when you get to know him, he's actually pretty sociable and fun to talk to.
Fun Fact: He was named after Romeo, one of ワン☆スター (One☆Star)'s guitarists!