Mizu is an 18-year-old anthropomorphic tiger shark. He's usually stoic, struggling to show emotion. He plays the guitar, and he likes rock music. However, he's prone to getting bloody noses. Because of the sheer size and bulk of his tail, he's very insecure about it. He wraps his tail around his leg when embarrassed. He does come off as annoyed and defensive due to what has happened, but can warm up to people if he gets to know and trust them well.