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.

An alien that looks like a sumo wrestler and has large diamond-shaped gills. Agile, it unleashes sumo stomps and thrusts from a crouching position.

Notable for her red dress and silky long hair, this yokai monster moves acrobatically. It seems she has some connection to Aira.

Also known as a Mantisian. Always has “dis” at the end of sentences. Powerful punches like a mantis shrimp and cute round eyes are his defining traits.

A male human anatomical model in the science room of Momo and Okarun’s high school. He starts moving after being affected by the power of a “certain something.”

An older version of a female anatomical model. Her duties came to an end and she was disposed of.