OVA
Description
Oogami Rei stands as the narrative's primary protagonist and antihero, marked by witnessing his mother's murder during the December 32 incident. This trauma induced severe shock and childhood amnesia, erasing memories of Sakura Sakurakouji. During the event, he lost his original left arm to Bentou Osekkai while preventing a massacre. Near death, he received a prosthetic arm from Code:Emperor, functioning as a secondary heart to regulate his life force. Temporarily raised by his manipulative older brother, "The One Being Sought," he severed ties upon realizing his exploitation and later joined Eden as the lowest-ranked Code:Breaker, Code:06, partnered initially with Kanda. He harbored an immediate rivalry with Code:04, Toki Fujiwara.

Physically, Rei has dark blue hair swept sideways, half-lidded blue eyes, and wears Kibou High's winter uniform: a white T-shirt, black long-sleeved jacket, and slacks. His gloved left hand conceals a thumb ring, both acting as power limiters. His "Lost" state—a temporary debilitation from power overuse—initially caused hypothermia but shifted to invisibility after Code:Emperor's resurrection.

His personality displays duality: polite and shy at school, yet ruthless during missions. He adheres to a personal Code of Hammurabi—"evil for evil"—but demonstrates concealed compassion, sparing change-capable foes like Haruto or Lily and saving cats mid-mission, including Yuuki while Lost. Immune to his flames, Sakura intrigues him; her ideals gradually reshape his worldview, leading him to acknowledge death yields only "regret and pity." Though emotionally oblivious—misreading Sakura's blushes as a "Rare Kind trait"—he grows more open, comforting her during trauma and showing affection to allies like Code:Emperor. Post-resurrection, his reclaimed powers soften his demeanor, making him kinder and more expressive, even smiling in battle.

His core abilities derive from the Flames of Purgatory, embodying seven deadly sins. Initially channeled solely through his prosthetic arm, he later achieves full-body mastery. Each flame demands sacrifice:
- **Satan's Blue Flame (Ira)**: Ignites combustion and victim illusions. Sacrifice: Taste.
- **Belphegor's Black Flame (Acedia)**: Nullifies sin-contaminated powers. Sacrifice: Yuuki's sound ability.
- **Mammon's Green Flame (Avaritia)**: Unleashes explosive blasts. Sacrifice: Saving Code:Emperor's life.
- **Beelzebub's Colorless Flame (Gula)**: Unknown effects. Sacrifice: Postmortem heart consumption.
He commands four flames narratively. Removing his thumb ring amplifies pyrokinesis beyond Code:01 levels. Non-flame skills include masterful swordsmanship (arrow deflection, rivaling Haruto), enhanced strength (shattering concrete), speed (countering iaido), and endurance (withstanding Angel-level assaults).

His evolution centers on Sakura. Initially observing her flame immunity, he later risks himself to protect her from his brother. Key shifts include sparing Haruto via a punitive chest flame and adopting non-lethal tactics. After Code:Emperor's soul departs his arm, he regains original flames and true personality, exhibiting warmth in battle and reconciling his past. His child alter-ego "Chibigami" displays brashness and playful promiscuity, reinforcing his core heroism.