Lit. "the youth Seitaka." One of two chief attendants of *Fudō Myōō 不動明王 (the other is *Kongara dōji 矜羯羅童子). Also counted among Fudō Myōō's eight attendants *hachidai dōji 八大童子. His name Seitaka is a transliteration of Sanskrit cetaka, meaning "servant, slave," and he is said to personify expedient action. He is most commonly found accompanying Kongara in the Fudō triad, Fudō sanzon 不動三尊, standing to the right of Fudō.
According to the Hachidai dōji hiyōhōbon 八大童子秘要法品, he assumes the form of a youth with skin the color of a red lotus, has his hair tied in five knots, and holds a vajra in his left hand and a vajra-club *kongōsho 金剛杵 in his right hand. Actual artistic representations of him found in Japan do not always follow these prescriptions. Seitaka is also mentioned as an attendant of deities other than Fudō, and in a rite dedicated to him in the Fukūkenjaku daranikyō 不空羂索陀羅尼経 (Taishō No. 1096), he is described as having a joyful appearance and smiling visage, in contrast to the wrathful nature attributed to him as an attendant of Fudō.