Momo is a girl with a very young and petite appearance. She has light-colored hair tied into two pig-tails and soft eyes. Both her ears are pieced with two earrings and she also sports a collar on her neck, befitting her witch-like appearance as she's always with her signature broom as well.
Momo's school uniform consists of a loose, short-sleeved black shirt and matching pants that are cut above her calves and she completes her outfit with black shoes.
Momo first appears as a reserved girl who was intimidated by the students from the Tokyo School. She has a close relationship with the girls at her school Kasumi and Mai and believes that women are unfairly treated even in the Jujutsu world. She was also willing to follow the idea that Yuji was a danger to everyone, putting her in direct conflict of ideals with Nobara Kugisaki.
Kyoto Goodwill Event Arc
Momo arrives at the Tokyo collage along with the other student and faculty, for the Kyoto Goodwill Event. After encountering the Tokyo students and staff, Momo attends at pre-event meeting. During the meeting, Momo talks with the other students about how they will kill Sukuna's host, Yuji.
Once the event starts, Momo rides on her broom to locate Yuji. When she finds Yuji, she contacts the others about Yuji's location and how Aoi is currently facing him. After the Kyoto students decide to let Aoi handle Yuji, Momo go to look for the Cursed Spirits but is suddenly attack by one of Megumi's shikigami, Nue. Momo lands in a tree and notices that Megumi's Nue ability is affecting her, when Panda and Nobara show up and greet her.
Momo and Nobara talks about how principal Yoshinobu wants the Kyoto students to kill Yuji. Momo then gets upset about how Nobara insults Mai and decides to teach her a lesson. Momo fights Nobara by being out of Nobara's reach and attacking from a distance. Momo also manages to use her broom to land a blow on Nobara's face, which angers Nobara. Momo then explains how women Sorcerer are met to be, but this just causes Nobara to get more angrier.
Momo continue to fight Nobara and makes sure to keep her distance, because of what Noritoshi told her about Toge. Momo manages to dodge Nobara's attack, and explains what it meets to be a Sorcerer of the Zenin clan. Nobara has the trees that her nails in them to fall on Momo, but Momo manages to evade them. When Nobara manages to get close, Momo kicks her away and distance herself. Momo lost control of her broom, when Nobara used her technique on the broom. Momo is attack multiple times by Nobara with a squeaky hammer. As Nobara goes to knock Momo unconscious, but Maki shoot Nobara unconscious. Momo is then contacted by Maki and is told to support them from the sky.
Later Momo notices that a screen is starting to cover the site where the Kyoto Goodwill Event is happening at. Momo then help bring Toge and Noritoshi outside of the screen. When the invasion is over, Momo agrees to continue the Kyoto Goodwill Event along with the others. Momo then plays a game of baseball with the other and is even allowed to use her cursed power. When Aoi is hit by the ball while at bat, Momo along with the other Kyoto student compliment Mai for hitting him. After the event is over, Momo along with the other students and faculty head back to Kyoto.
Broom: Momo carries a straw broom similar to that which witch's use. It is compatible with her Cursed Technique, allowing Momo to manipulate it at will.
Abilities and Powers
Overall Skill Level: Momo is a Grade 2 Sorcerer as speculated by Panda. She possess a Cursed Technique that allows to her to stay mobile and collect information via her ability to levitate. Momo was able to compete with Nobara thanks to her experience. By staying out of range, Momo made it difficult for Nobara to reach her with any attacks.
- Momo's surname contains the kanji for "west" (西 nishi?) and "temple, shrine" (宮 miya?), and her first name contains "peach" (桃 momo?).
- Momo ranked 35th place in the manga's 1st Character Popularity Poll with 338 votes.
- Momo is American-Japanese (her father is American).
- Momo is 150 cm tall.
- Momo enjoys cute things and enjoys shopping with the second-year girls.