Dark Shadow is a powerful Quirk manifested by Fumikage Tokoyami in Boku no Hero Academia. It appears as a sentient shadow-like creature with its own personality and combat instincts, acting as both Tokoyami’s partner and weapon. Dark Shadow grows stronger in darkness and becomes harder to control, while bright light weakens it. In the series, it plays a major role in Tokoyami’s fighting style, enabling close-range attacks, mobility, and protection, and it often reflects Tokoyami’s disciplined but intense nature.