Change 123 (ちぇんじ123, Chenji Hi-Fu-Mi) is a Japanese manga series written by Iku Sakaguchi and illustrated by Shiuri Iwasawa.

Subjected to excessive physical and mental training, Motoko developed three distinct split-personalities known as Hibiki, Fujiko, and Mikiri.

Under the care of each parent, Motoko's childhood was subjected to excessively rigorous training, straining her to the point that she developed three split-personalities, Hibiki, Fujiko, and Mikiri, colloquially known as HiFuMi.

The manga received a mixed reception: Animeland regretted an over-reliance on fan service and stereotypes, but praised Shiuri Iwasawa's art.

[3] Planete BD rated most volumes "good" or "average", saying that the manga's main appeal was its humour and atmosphere rather than its scenario,[4] while praising action scenes,[5] but regretting bad quality impression and paper from the editor.