Space Brothers Characters

An Indian astronaut candidate, who is also a fortune-teller.

An astronaut at JAXA. He is the Japanese astronaut who has spent the most time working in space, having done several missions on the ISS. He has a loving wife and daughter.

An astronaut who died in an accident upon re-entry where the pod's parachute did not deploy correctly. Good-natured, kind and confident. He is also something of a mentor to Hibito.

An American astronaut with NASA who goes on a mission to the Moon with Hibito, Damien, Freddy, Linda and Karen. He likes to work out a lot.

An American astronaut with NASA, who goes on a mission to the Moon with Hibito, Freddy, Buddy, Karen and Linda.

An aspiring Japanese astronaut candidate.

An astronaut with NASA. He goes to the Moon on a mission with Hibito, Buddy, Damien, Karen and Linda.

A middle-aged man who worked on rocket development. He is friendly and talkative.

An aspiring astronaut that drops out, who becomes friends with Serika during the examination process. She drops out after the second exam.

A young man with a quick temper. He is often quick to point out errors and has no problem speaking his mind.

Mutta's guide around NASA when he visits. She is very talkative and knowledgeable of NASA and astronaut training.

Nitta Reiji's younger brother who has become a hikikomori, staying in his room at home with his mother caring for him.

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.

An astronaut co-leading the ASCAN basic training program along with Vincent Bold. He likes orange juice and is generally cheerful.

An American astronaut, who likes Japanese things like sushi. He is Hibito's backup on the upcoming mission to the moon.

A young man who wants to be an astronaut. Is very athletic.

An employee at JAXA, he initially wanted to become an astronaut but wasn't lucky enough.

One of Team E's astronaut advisers (the other being Lowry Cuomo) during the desert survival training program for the ASCANs.

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.

Mutta is an engineer and aspiring astronaut. Mutta aims to be a model older brother, thinking "the older brother should always lead." Mutta has excellent short term memory skills.

A young, tall and calm man. He studied sports medicine at the University of Tsukaba. He also plays kendo.

Nitta Reiji's mother. She cares about her sons, Reiji and Kazuya. She lives with Kazuya, who has become a recluse.

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.

An American astronaut candidate.

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.

The Director at JAXA. He has a unique way of speaking, and is rather quirky and upbeat.

Tamura works with Sharon using telescopes to look up into space.

A smart young man who aims to become an astronaut. He spends a lot of time playing with his Rubik's cube and usually does not talk unless asked first.

A JAXA staff member who helps manage the third exam. He is rather strict and to the point.

An astronaut co-leading the ASCAN basic training program with Larry Bison. He's an uptight, no fuss kind of guy who gets straight to the point.

A young man who wants to become an astronaut.

A young man who aims to be an astronaut. He gets nervous really easily.