A powerful youkai of at least 1200 years of age, reputedly older than Gensoukyou itself. Nominally responsible for guarding the border between Gensoukyou and the outside world, but is frequently sleeping or slacking around, leaving her work to her shikigami Yakumo Ran and Ran's own shikigami Chen.
Besides her servants, she is friends with Ibuki Suika, Saigyouji Yuyuko (whom she knew from as early as the latter's days as a human) and Hakurei Reimu (the other barrier guardian, whom she sometimes pesters). Also hinted to be Morichika Rinnosuke's business partner and supplier of items from the outside world.
Yukari has the power to manipulate boundaries, as well as create gaps, leading to her nickname "Sukima". However, she frequently holds back her powers and most of the time she only goes as far as playfully dragging any unsuspecting human from the outside world into Gensoukyou.
Yukari has an as-yet undefined connection to Maribel Hearn.
Usually wears a white dress with a purple tabard on top, a white mob cap with a hat ribbon, carries a parasol, and long wide sleeves. Her alternate outfit is a purple frilled dress with puffy short sleeves and elbow gloves. Has long blonde hair with red ribbons along the length of the hair and either purple or yellow eyes (official art is contradictory in this regard), with purple eyes being more common.
- pool #1970 - God Damn It, Yukari! - Yukari being a troll, usually with her gap powers.
- pool #4099 - Good Work, Yukari! - Yukari using her powers for good
- Sukima onna