Dazai Osamu

Dazai Osamu is the crown prince of the kingdom of FinRay, which has maintained an alliance between nations for centuries. A distinguishing feature of the royal family is their ability to nullify gifts from others.

He possesses a rather mischievous and cheerful character, while also being self-sufficient. Dazai is a very enigmatic person; his true motives will never be revealed unless he himself reveals them. He constantly attempts to understand his true "self," which causes inconvenience to his colleagues. He greatly enjoys teasing Kunikida Doppo, first saying important things to him so that he writes them down in his notebook, and then, when Kunikida does so, Osamu says that everything he said was a lie. As a result, Kunikida dislikes Dazai and often gives him a good scolding. Despite this, Dazai has shown an incredibly sharp mind, thanks to which he quickly managed to guess who Atsushi is, immediately making it clear that he is a true detective who doesn't miss a single clue. He maintains complete composure in battles, even when the situation takes an unexpected turn. He's practically the court jester of the entire kingdom. His parents hope to get rid of him through marriage.