Minotaur

This character is a minotaur. A minotaur is a mythical creature portrayed in Greek Classical times with the head and tail of a bull and the body of a man.

According to the monster girl wiki, a minotaur is a beastman type monster with the characteristics of an ox. They are monster warriors that have freakish strength and can effortlessly swing enormous weapons. Their temperament is extremely rough, and since they don’t think much and their actions are guided by emotion, they are exceedingly dangerous monsters.

A Holstaur is a subspecies of the minotaur where the character has the characteristics of a cow instead.