[8] As of June 2021[update], Momoko was living with her husband and art manager, Yo Mutsu (Japanese: 陸奥陽), and their pet dog, Momo.

[9] Though claiming that no specific influence inspired her to become an artist, Momoko admits that seeing Atsushi Kaneko's works as a high school student is when she decided to become an illustrator.

[12] After graduating from art school, Momoko was an editor at a pornographic magazine, and she had uncredited illustrations published in the horoscope section of a 2008 issue of the Sunaipā Eve (Japanese: スナイパーEve, lit. transl.

[3][6] She considers her first published comic book work to be her illustrations for the Winter 2013 and Spring 2014 issues of Girls and Corpses magazine.

[13] In early 2015, Momoko participated in her first Japanese conventions, the manga marketplace Comitia and the art-oriented Artism Market.

In October 2015, Momoko had her first exposure to comic conventions when she joined Girls and Corpses’ owner Robert Steven Rhine at Comikaze, where he introduced her to an editor at Heavy Metal.

[15] In August 2016, Momoko participated in Portland's annual Forest for the Trees public art project, creating a mural at Cider Riot (807 NE Couch Street).

[16][17] In 2017, to commemorate Miyavi's 15th year as a solo artist, Momoko was selected to create an official t-shirt design for the musician.

[19] In 2018, Momoko created the cover illustration for the German Blu-ray + DVD "Mediabook" release of the Japanese splatter film Kodoku: Meatball Machine.

[22] Momoko contributed eleven illustrations for the base set of the 2019 Upper Deck Flair Marvel trading card series and illustrated the entire 90-card base set of the 2020 Upper Deck Marvel Anime trading card series.

[23] In 2021, Marvel Comics launched Momoko's Demon Days series, creating what the artist referred to as her "Momoko-verse", a setting which reimagined the company's superhero characters within the framework of Japanese folktales.

[29] Momoko prefers to tell stories involving samurai, Japanese folktales, dreamlike situations, and the real-life problems of adolescents.

"[34] Momoko has stated that her art is primarily inspired by several genres of Japanese cinema, specifically horror, military, and pink films,[4][6] as well as various styles of music.