Tsuyoi Hyō (票強い, Hyō Tsuyoi) is the half-elder sister of Shin Hyō, she was born to their father Raiga Hyō and his distant relative, Seika Hotaru. She was abandoned by her father on birth, which has always been her driving factor. Shin has never been aware of his half-sister, while Tsuyoi has always kept an eye on Shin.