Kasai is a usually quite individual, he likes to keep to himself and not interact with people. He’s usually reserved and introverted but he’s a emotional individual, its hard for him to make friends but once he does, he tends to be extremely loyal to them. Although he acts rather apathetic in most instances, he is extremely emotional unstable underneath such attitude, although unlike his younger self, he’s learn to his whatever emotions under a mask of indifference.