Yamimaru
Summary
Yamimaru serves as Tōya’s loyal bat familiar, acting as the sole individual Tōya can depend on, particularly when the latter collapses due to energy depletion. He possesses the unique capability to assume a human guise, a transformation he can maintain for approximately four and a half hours each day. Yamimaru has access two distinct human appearances: one is a towering figure standing 6'6" who resembles Tōya’s older brother, while the other is a youthful form that appears to be Tōya’s younger sibling.
