Casvarius is a power-type Zoanoid from the Guyver series. It appears to possess a very avian-like body structure, though it has no wings and is incapable of flight. It is one of the faster varieties of power-type Zoanoids, equipped with powerful legs allowing it to easily pursue enemies and deliver lethal kicks. Casvarius was developed at Chronos' New Guinea facility and at least one model appeared and attacked Masaki Murakami's investigative team five years prior to the D-59 Incident in Japan.