Misute Rareta

Misute Rareta (見捨てられた, Abandoned) or simply Misu (三須, Miss) for short. Real name Desu Ume (です梅, Ume Desu) is Yuu Ume's older brother who, unlike Yuu, is a Legal Mage who performs on his own while not belonging to any guild anymore since he defected from his previous unnamed guild.

He is known as Emotionless (無表情な, Muhyōjōna) because of his face always having an emotionless expression no matter what may happen to him.

Trivia

 * Misute's apearance is based on Chrollo Lucilfer from Hunter X Hunter.
 * Misute and Yuu are most likely the opposite of each other that is proven by the many opposites the two have such as Misute never showing any expressions while Yuu does, Misute is a Legal Mage while Yuu is a Dark Mage and so on.