During the events of Gorin High's storyline, the group discovers Momo being chased by "Batsu" and rushes to her aid. After dealing with Batsu, a fearful Momo lunges herself at Shoma and embraces him much to his embarrassment and allowing Batsu to flee. Natsu is immediately wary of the young girl, who appears to have taken a shine to Shoma, but is brushed off as just being jealous. Eventually, an argument breaks out between Shoma and Natsu which splinters the group causing Shoma to leave with Momo and investigate why Batsu was attacking her. Momo then proceeds to manipulate the simple-minded Shoma into attacking students from other schools before betraying him and knocking him out. She is also seen giving Daigo Kazama orders to attack Gorin High by Edge at one point. While investigating on their own, Natsu, Roberto and Nagare come across Momo who attacks them. After the fight, Natsu inquires her about Shoma's whereabouts but Momo flees and leads them to Shoma and the fake Batsu who turned out to be Kurow Kirishima in disguise. It is revealed that Momo is a member of the Darkside Student Congress and was sent to infiltrate Gorin High to split up and weaken the group. After Shoma reunites with his friends the two groups clash which ends in victory for Gorin High. Kurow blames Momo for the defeat and abandons her leaving her in tears. When the group follows him to Justice High they find Kurow incapacitated by an insane Hyo Imawano. Momo tries to rush to Kurow's side but is attacked by Hyo only to be saved by Shoma. Momo then teams up with Gorin to defeat Demon Hyo. Gorin's ending shows Momo interrupting an intimate moment between Shoma and Natsu having developed a real crush on him. This infuriates Natsu and causes Shoma to run away in embarrassment with both girls chasing after him much to the enjoyment of Roberto and Nagare.
"Crash the Heart"
Momo's innocent looks hide her scheming and cruel personality. She enjoys manipulating people all for the benefit of her boss, Kurow, who she has a crush on. She has a dislike of big girls which puts her at odds with Natsu almost instantly. She is, however, capable of showing real emotions as she is left genuinely distraught when Kurow abandons her. Also, despite faking interest in him initially, she later develops a real crush on Shoma.
- Her family life remains undisclosed as she lives alone in the Gorin dorms.
- Momo occasionally dabbles in a bit of modeling for a manufacturer of children's clothes (though it seems she's unaware they are for children).
- Momo has a love for art.
- Her academic record shows she fares poorly in home economics.
- She is voiced by Rei Sakuma.
- She appeared as a card in SNK vs. Capcom: Card Fighters Clash games.