A high school girl from a family of spirit mediums. Her type is hard-boiled tough guys. She doesn't believe in aliens yet believes in ghosts. When she is abducted by the Serpoians, she awakens her hidden psychic powers.

An occult freak high school boy. He doesn't believe in ghosts yet believes in aliens. He ends up forced to play tag with Turbo Granny in order to break her curse.

Momo's grandmother, and a spirit medium active under the pseudonym Santa Dodoria. She is powerful enough to place a barrier around her house, and she gives advice to Momo and Okarun.

A popular, pretty girl at school. After picking up a certain something, she develops special abilities. She mistakenly believes Momo's psychic powers are demonic.

Momo's childhood friend and first crush. He's handsome and tall, but his words and actions tend to be a bit shallow. He goes to Seiko for help after encountering a spirit in the house he just moved into.

A youkai that used to appear at unexpected times and places, and run rampant all over the country. Currently, she resides in Shono City Tunnel and is feared because she combines with a bound spirit.

Male-only aliens that clone themselves to increase their number. They target human females to regain reproductive organs.