“Masayoshi (real name)”
First Appearance: Chapter 4
Masaki is an elderly curse user who has been disguising himself as a first-grade elementary school student for three consecutive years. Using a shapeshifting ability that requires human skin as material, he maintains a child's appearance while employing a guardian shikigami linked to his deceased mother's lingering spirit. Years prior, he suffered a catastrophic defeat at the hands of Yuji Itadori and has been in hiding since. His refusal to progress beyond first grade is attributed by Tsurugi to possible senility — his cursed technique slowly spiraling out of his control as age catches up with him.
Masaki's technique, named after the 1992 romantic comedy manga. It comes with a cenobite-like seamstress shikigami that fights in tandem with him and can use his technique to a limited extent, including performing feints by impersonating Masaki himself. His primary weapon is a large sewing needle.
Masaki can alter his physical appearance to a significant degree, using human skin as a crafting material. This allows him to maintain a convincing child disguise over extended periods.
