Yufufu (ユフフ, Yufufu) is a side character of the Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita series. She is a droplet spirit and Azusa's surrogate mother.
She's introduced in Light Novel 4, the Chapter: We Met a Droplet Spirit, where Azusa, Falfa, Shalsha met her during the World Spirit Summit. After the Summit they were invited to spend the night at her house, where she told them that she was the one who sent them letter, specifically for the purpose of meeting the Witch of the Highlands and little Falfa and Shalsha due to her job as a administrator of World Spirit Summit. Late that night, she became Azusa's surrogate mother.
She notably has quite a youthful motherly appearance, with quite large breasts and kind expressions. Her hair is long and straight, tied in a ponytail. Her clothing is also quite motherly yet also seductive, consisting of a white blouse with dark sleeves (idk, we don't have coloured scans) and white cuffs while exposing her cleavage and navel, as her skirt is of a similar dark colour and quite long yet with with a very high cut on the right side, exposing almost all of her leg.
She has a gentle, caring, motherly air about her, making you feel at ease and safe, capable to open up about your vulnerabilities.