He’s the drummer in the Black Stones, often shortened to Blast, band. Many people jokingly called him "Baldy." He was almost always seen wearing shades, but he has brown eyes under them. His sharp eyes & thin eyebrows gave him a somewhat menacing appearance. He often wore suits, or other formal, business-like clothes. He had five piercings in his left ear, one in his nose, & four in his right ear. At heart, Yasu was a trustworthy & caring person. He is shown to be a reliable & dependable friend.