Mamiya Chida

Mamiya Chida appears as a boy with silver hair, green eyes, and tan skin, giving him a striking and ambiguous appearance. His looks closely resemble Anthy Himemiya and Dios, a fact that becomes important later in the story. However, this silver-haired version of Mamiya is, in fact, not the real Mamiya, but an imposter played by Anthy Himemiya. The real Mamiya, Tokiko Chida’s younger brother, was an ordinary boy with black hair and freckles.

Mamiya is calm, gentle, and soft-spoken. Despite his repeated claim that “there is no such thing as eternity,” deep in his heart, he genuinely longs for it. He is a thoughtful and understanding confidant to Souji Mikage, providing comfort and support. Quietly tormented by despair and illness, his tragic yearning for something everlasting underpins his every action.

Mamiya is terminally ill and has only a short time left to live. His older sister Tokiko Chida visits Ohtori Academy as an inspector to oversee a research project aiming to create “eternity” for Mamiya—something that could save his life. Despite his apparent cynicism, Mamiya truly desires an eternal existence. He was always a good friend and supporter to Mikage (formerly known as Nemuro), both in the past and present.

Black Rose Arc: Partner and Confidant to Mikage

Mamiya is portrayed as Mikage's irreplaceable companion, watching over the secret “Mikage Seminar” in the depths beneath Ohtori Academy. He only ever interacts directly with Mikage and, on a rare occasion, speaks to Kanae Ootori.

The Burning of the Nemuro Memorial Hall

After Mikage learns of the complicated relationship between Akio Ootori (the End of the World), Tokiko Chida, and himself, Mikage’s desire for “eternity” wanes. At this turning point, Mamiya tells Mikage that he wants eternity. Following this admission, the Nemuro Memorial Hall is set on fire, resulting in the deaths of a hundred boys, a tragedy that pushes Mikage forward.

The Truth About Mamiya

It is widely believed that Mamiya was responsible for the fire, but in the climax of the Black Rose arc, it is revealed that this is a fantasy created by Mikage. In reality, Mikage himself was the perpetrator. The silver-haired, green-eyed Mamiya seen up to this point is a fake—portrayed by Anthy under Akio’s orders to manipulate Mikage. The real Mamiya, Tokiko’s brother, had already died. Anthy’s double role accounts for the resemblance between Mamiya, her, and Dios, and explains her occasional dozing off during the arc.

Facing the Truth

Mikage, clinging to memories of both Mamiya and Tokiko, keeps the image of Mamiya alive by his side. However, during Mikage’s duel with Utena Tenjou, he finally regains his lost memories: the real Mamiya’s appearance, the fact that Mamiya had died, and—most importantly—that Mikage himself set the hall ablaze, not Mamiya.

• Souji Mikage: Mamiya is Mikage's closest ally, confidant, and emotional anchor.
• Tokiko Chida: Mamiya’s elder sister, whose efforts to research “eternity” were motivated by her desire to save him.
• Anthy Himemiya: Secretly plays the role of the false Mamiya, deceiving Mikage under Akio’s orders.
• Akio Ootori: Manipulates events by instructing Anthy to impersonate Mamiya.

None supernatural; his presence is more influential in a psychological and emotional sense, serving as the core of Mikage's illusions and motivations.

• The “100 boys” who perished in the fire were all participants of the Nemuro Memorial Hall, a key location in the Black Rose arc.
• Mamiya's catchphrases (“There is no such thing as eternity” and “I want eternity”) summarize his internal conflict.
• It is only at the arc’s climax that both Mikage and the viewers learn that Mamiya’s appearance and story are not as they seemed.

• “There is no such thing as eternity.”
• “I want eternity.”