Saint Seiya (1986)

S01E47 Farewell, Hyoga! Sleep, Oh Noble Warrior

Camus of Aquarius confronts the young Saint Hyoga, determined to hinder his advancement, even though he isn't the overseer of the temple where their clash is about to unfold. Their duel is complicated by a shared bond with Hyoga's mentor, who was once a pupil of Camus himself.