Deadly, humanoid monsters which move at super speed and have incredible strength and jumping ability. Blood Thrashers each have a long, monkey-like tail which they can extend and use as a whip.
Cadence, a half-human, half-Blood Thrasher has blue skin and scarlet eyes in her Blood Thrasher form, whereas her brother, Gino's, Blood Thrasher form has dark red skin and bright green eyes. Whether this difference in colour is individuality or sexual dimorphism is unknown.