Mutta Hibito Friends

A young man who wishes to become an astronaut. He becomes friends with Mutta during the JAXA examinations. He likes accurately guessing people's age.

The mother of Hibito and Mutta. She is very caring and enthusiastic.

A middle-aged woman and Ozzy Smith's husband.

The father of Hibito and Mutta. He has fun doing various voices.

Nanba is an astronaut and is Mutta's younger brother. He is cheerful and energetic. He has acquired the nickname "Samurai Boy" since working with NASA in America.

A middle-aged man who enjoys casual gambling and is friends with Hibito in Houston, and helps walk his dog Apo.

A young female doctor who wants to become an astronaut. She has a large appetite, keeps a diary and is very hard working and enthusiastic.

Sharon is a aerospace scientist, who conducts researching using telescopes to look up into space. She is something of a mentor to Mutta and Hibito when they were young.