Undine is a recurring supernatural character in Yondemasu yo, Azazel-san, a comedy manga and anime series centered on bizarre demons, angels, and exorcists. She is based on the water spirit undine from mythology and appears as one of the many eccentric beings involved in the series’ chaotic, often absurd situations. Her role is mainly as a supporting character who adds to the strange supernatural world, contributing to the comedy and the unpredictable interactions among the cast.