Tatsuya Kaname is Madoka Kaname's younger brother in the series, aged three to four during the main storyline with official sources varying between these years. He possesses light brown hair, brown eyes, and permanent blush marks on his cheeks, typically dressed in a green hoodie, blue jeans, and dark red socks. He shares a close, conflict-free bond with Madoka within their family, which includes house husband Tomohisa Kaname and corporate executive mother Junko Kaname. The family resides in Mitakihara Town, where Tatsuya attends kindergarten. A defining trait is Tatsuya's residual awareness of Madoka after her erasure from existence in the series finale. He draws her figure in Episode 12 and recognizes her as an "imaginary friend," attributed to childhood innocence enabling perception of incomprehensible entities. Supplemental material notes this ability fades with maturity, likely erasing these memories. In *Puella Magi Madoka Magica: Rebellion*, Tatsuya appears in early family scenes and is later confirmed among the few real humans trapped in Homulilly's Labyrinth, persisting through altered realities. Spin-off media expands his appearances: *Magia Record* features him as a non-playable character with a card titled "Ultimate Tatsuya," referencing Madoka's ascended form. He also appears in *Puella Magi Madoka Magica: The Different Story* manga and the crossover *Persona Magica*, where as the youngest character, he occasionally mistakes Yu Narukami for Madoka due to resemblance. Tatsuya undergoes no substantial character development across official media. His role remains supportive, emphasizing familial bonds and the thematic weight of Madoka's absence through his unique childhood perspective.