Guyver: Dark Hero (1994)

Sean Barker finds himself in a dangerous world after being given control of the Guyver, an alien bio-armor. He had previously defeated the Kronos Corporation, a group of mutants who wanted the Guyver for their own harmful plans.A year later, Sean continues to try to understand why the Guyver forces him to fight. As he investigates the suit and its urge to battle, he realizes he's fighting not only outside enemies but also internal struggles with his new powers. The situation becomes more urgent as Sean tries to uncover the Guyver's secrets while avoiding the same dangers that once pursued him.