Patchouli Knowledge is a very smart, anemic and asthmatic magician from the Scarlet Devil Mansion. Although she is just a librarian, and helped solve only three incidents in Gensokyo, she is still a very popular persona, showing up in many public places and is referenced quite often. She spends most of her time in the mansion's library reading and writing magic books. It seems that she's capable of very powerful magic of all kinds, using many elements in a single spell, but due to her anemia, asthma and general poor health she's often unable to recite her spells. She also tends to experiment a lot with her assistant, little devil girl Koakuma to try finding new spells or potion recipes. This time, Patchouli was trying to find the recipe for potions of enlargement and gluttony, and she made the potions, but due to the mess on her workplace, she tripped onto the floor, and because of the quake her fall have caused in the room, both potions fell down horizontally at the edge of the table and the contents poured into Patchouli's mouth, making her 7 metres height, 3 metres width and making her weigh 621kg. Due to the gluttony potion Patchouli accidentally consumed, she has a very keen taste for living humans and even youkai, so whenever Patchouli sees one, she'll attempt to snatch them and swallow them. Patchouli's hair and eyes are purple, and has many ribbons tied to her hair and other body parts. She wears pajama-like clothing and a night-cap which are her daily wear. She always looks pretty grumpy, with her eyes half-closed and her facial expression looking bored. Patchouli's digestive tract is very thick, so going out of it forcefully, be it slicing your way out or forcing yourself through her belly, is impossible. Her stomach needs 2 hours to break a meal down, afterwards it's sent to a 7-hour long trip to her small intestines and then all the remaining mush will settle in her bowels in over 4 hours, which means 13 houes of digestion total.