Shin Towada is a Japanese novelist, manga artist, and screenplay writer known primarily for her work adapting and expanding upon existing manga properties into prose fiction. She resides in Fukuoka Prefecture and is the older sister of Sui Ishida, the creator of the Tokyo Ghoul series. Towada began her literary career in 2010, debuting as a novelist under the pen name Makoto Towada with the novel Love Typhoon. She started using the name Shin Towada in 2013 when she began writing novelizations for manga published by Shueisha. In addition to her prose work, she has also created manga under the pen name Oku To, including the four-panel comedy series Matsu Kacho wa Onna Wota, which was serialized from 2016 to 2018.

Towada is most widely recognized for her series of light novels set in the Tokyo Ghoul universe, all based on the original manga by her brother Sui Ishida. Her contributions to this franchise include Tokyo Ghoul: Days, Tokyo Ghoul: Void, Tokyo Ghoul: Past, and Tokyo Ghoul: Antan. These novels serve as side stories and prequels to the main narrative, exploring events that occur before the primary storyline of the manga. Tokyo Ghoul: Past, for instance, covers the period before the steel frame incident in the 20th Ward, when Ken Kaneki was still a human and Rize Kamishiro was actively hunting. Another volume, Tokyo Ghoul: Antan, is structured in five chapters plus a bonus chapter, depicting life in Tokyo before the main series begins.

Beyond her novelizations, Towada holds a direct credit in anime as a writer for Tokyo Ghoul: Pinto, an original video animation released in 2015. This anime short focuses on the character Shu Tsukiyama, known as the Gourmet, and depicts his first meeting with the photographer Chie Hori. She shares writing credit on the project with Sui Ishida. Her work on this adaptation demonstrates her role in translating and expanding the manga's narrative into animated form.

Thematically, Towada's writing in the Tokyo Ghoul novels consistently emphasizes the moral complexity of the franchise's central conflict between humans and ghouls. Her prose explores how ghouls, despite needing to consume human flesh to survive, are capable of love, empathy, and morality, challenging the perception of them as mere predators. Her stories frequently address themes of discrimination, justice, and the shared experience of living with doubt, focusing on the internal struggles of characters caught between two worlds. By focusing on character-driven side stories and prequel material, her work adds psychological depth to the existing universe without advancing the main plotline established by Ishida.

Shin Towada holds a specific and significant place in the anime and manga industry as a specialist in prose adaptations of popular manga properties. Her work demonstrates the established practice within Japanese publishing of commissioning novelists to expand successful manga franchises into light novel formats, creating additional narrative content that complements the source material. Her unique family connection to Sui Ishida distinguishes her career, yet her consistent body of work on Tokyo Ghoul and her independent manga creations establish her own professional identity as a writer and artist.