Shikidouji is a Japanese illustrator best known as the creator of the original character designs for the Full Metal Panic! series of light novels, anime, and manga. The person is a female artist from Aichi Prefecture, with a birth date recorded only as August 3rd. Her professional name, Shikidouji, originated from a longer pseudonym, The Zashiki-warashi, which she eventually shortened to its current form.

Shikidouji rose to prominence through her long-term collaboration with author Shouji Gatou on the Full Metal Panic! franchise. She is formally credited as the illustrator for the original series of light novels published under Fujimi Fantasia Bunko, and her character designs serve as the foundation for all subsequent adaptations, including the anime television series Full Metal Panic! The Second Raid. The DVD releases of that anime credit the original story to both Shouji Gatou and Shikidouji, highlighting her integral role in the franchise's creation. Her work on Full Metal Panic! was recognized in the 2008 edition of the light novel guide Kono Light Novel ga Sugoi!, where she was ranked fourth in the illustrator category.

Beyond the Full Metal Panic! series, Shikidouji has built a substantial career as an illustrator for fantasy tabletop role-playing games and light novels. She has provided artwork for the TRPG titles Seven Fortress and Monster Collection, and her illustrations have regularly appeared on the cover of the magazine Gamers Field. Her extensive bibliography of light novel illustration credits includes works such as Shouji Gatou's Amagi Brilliant Park, as well as the series Glorious Dawn, Tornado!, and Isekai Meikyuu de Harem wo. She also published an art collection titled Colorful Wind - The Art of Shikidouji in 2002.

Shikidouji's artistic identity is characterized by clean, expressive line work and a strong ability to define character personality through visual design. While the Full Metal Panic! series gave her extensive experience drawing male characters in military settings, a significant portion of her other projects focus on female characters in fantasy environments. Her consistent work since the late 1990s has established her as a significant figure in the Japanese light novel industry, particularly as an illustrator whose original character concepts have successfully transitioned into major anime productions.