Bleach: The DiamondDust Rebellion

Bleach: The DiamondDust Rebellion centers on Toshiro Hitsugaya, making it the most Hitsugaya-centric content in the Bleach franchise. A theft of the King's Seal — a powerful Soul Society artifact — implicates Hitsugaya himself, who disappears after the incident, forcing Ichigo and the other Soul Reapers to navigate their loyalty to their friend against their duty to the institution. Hitsugaya's investigation leads to Kusaka Sojiro — a Soul Reaper from Hitsugaya's past whose fate was sealed by the Soul Society's laws in a way that left Hitsugaya haunted with guilt.

The DiamondDust Rebellion is generally regarded as one of the stronger Bleach films because it takes one of the series' most beloved supporting characters and constructs a personal conflict around him with genuine emotional stakes. The history between Hitsugaya and Kusaka adds depth to Hitsugaya's usually reserved personality, and his Zanpakuto is given its most thorough showcase in the franchise. The animation quality is a step up from the first film, and the dual-Ice user climax provides a visually distinctive battle. Non-canon but recommended for Hitsugaya fans who want more exploration of his character beyond his TV series appearances.