Mytho, originally Prince Siegfried, is the protagonist of Drosselmeyer's unfinished tale "The Prince and the Raven." He sacrificed his heart to seal the monstrous Raven, losing his emotions, memories, and identity, leaving him ageless and emotionless while physically resembling a fifteen-year-old human. With white hair and hazel eyes, he attends Gold Crown Academy as an empty vessel, entirely dependent on his roommate Fakir for daily care and protection. Initially devoid of personality, Mytho acts with passive obedience, lacking agency and readily following any suggestion regardless of risk. He is a technically skilled ballet dancer whose performances lack emotional depth. His sole remnant of his former self is an instinct to protect others, leading to self-endangering actions due to his inability to feel fear. He maintains a one-sided relationship with Rue, the Raven's adopted daughter, merely accepting her presence without reciprocating her feelings. Mytho's transformation begins when Princess Tutu returns shards of his shattered heart. Each shard reintroduces an emotion like regret, sadness, or happiness, causing confusion and internal conflict. This process awakens his curiosity about his identity and desires, prompting him to gradually resist Fakir's control. However, one heart shard, corrupted by the Raven's blood via Princess Kraehe, turns him into the "Prince of Crows." In this corrupted state, he becomes deceitful, abrasive, and violent, attempting to steal girls' hearts as sacrifices for the Raven, cruelly mocking Rue and rejecting both her and Princess Tutu. His redemption occurs when Rue confesses her love and sacrifices herself to save him. Combined with the return of his final heart shard—Princess Tutu's pendant—this breaks the Raven's influence. Restored as Prince Siegfried, he regains his noble nature, selflessness, and memories. He rescues Rue from the Raven, acknowledges her love, and asks her to be his princess. After defeating the Raven with Fakir and Duck (Princess Tutu's true form), he returns to his story with Rue, implying marriage. Mytho's relationships evolve significantly. With Rue/Kraehe, he moves from passive acceptance to genuine love, recognizing her selflessness. With Princess Tutu, he experiences longing and fear, drawn to her as a symbol of his returning emotions while unaware of her identity as Duck. With Fakir, their dynamic shifts from guardian-and-ward to mutual respect; Fakir evolves from controlling him to supporting his autonomy, and Mytho ultimately views him as a trusted friend and brother figure. In all official media, including the manga, Mytho's core story remains consistent: he begins as a hollow vessel, regains his heart through external intervention, faces corruption, and achieves restoration through love and sacrifice, serving as a catalyst for others' development while embodying themes of fate, emotional rebirth, and identity.