Zeiren's most obviously seen traits seem to be his fun-loving attitude, and his childish outlook on the world. Whenever he feels things are getting boring, or that he and his friends require something to do, Zeiren is usually the first one to suggest whatever catches his interest right away. And given his childishness, Zeiren often goes straight into using extreme measures to alleviate his boredom, and is usually too naive to see the dangers in what he does to reach his goals.