Sansa Tamakawa

Sansa is professional, attentive, and generally serious while on duty. Canon gives him little material outside his police work, so his characterization is defined chiefly through his competence as an investigator and assistant.

His appearance is highly feline, but the story does not reduce him to a purely comedic mascot. He participates in serious criminal investigations and handles information involving Quirk registries, villains, and hero-related incidents.

Sansa is left-handed, a small supplementary detail established through character material.

Sansa's exact Quirk name and technical abilities have not been formally explained.

His cat-like head strongly indicates a Mutant-type Quirk, but canon does not establish specific enhanced senses or physical capabilities clearly enough to assign them as confirmed powers.

His demonstrated strengths instead come from police procedure. He accesses Quirk registries, criminal databases, incident reports, and law-enforcement information while assisting investigations.

In Vigilantes, Sansa works with Naomasa while investigating criminals affected by Trigger, demonstrating familiarity with unusual Quirk-related cases.

Sansa appears among the police personnel working with U.A. and Pro Heroes after the U.S.J. attack.

My Hero Academia: Vigilantes expands his role by showing him accompanying Naomasa during investigations in Naruhata years earlier.

During one early case, Sansa checks police and Quirk records for an unidentified criminal whose abilities appear unusually powerful, helping Naomasa recognize evidence of Trigger use.

He continues appearing around major police operations as the scale of villain activity expands beyond what heroes can handle independently.

Naomasa Tsukauchi is Sansa's closest established professional associate and the detective he regularly assists.

Shouta Aizawa, All Might, and other Pro Heroes work with the police organization to which Sansa belongs during major villain investigations.