Uno is proud of his appearance and confident in himself, often showing vanity: he considers himself popular. He can be quite rude and tactless, but despite his superficial attitude, he is by no means selfish and is portrayed as a kind, warm and friendly person. He understands his friends well and is ready to accept them as they are. Also, Uno is easy to scare. However, it is not difficult for him to resist danger for the sake of his friends. He considers gambling as a hobby.