Likes observing the stars from very young, and is a one-man Astronomy Club. Shows her otaku side when the topic is about the stars. Often is lost about something or a crybaby, but her feelings of believing in her friends is stronger than anyone else. Childhood friends with Aoi, but had gotten out of touch as they advanced to different junior high schools.

A boyish-looking girl, but actually loves cute things. She believes she hides things well, but she is the type that often shows what is on her mind on her face or in her actions, and is a terrible liar. Childhood friends with Subaru, and feels a sense of duty to protect Subaru.

Gentle and kind, the biggest conscience of the five. On the other hand, she eats a lot and is very powerful. She shies away from asserting herself for the most part, but her curiosity is greater than anyone else's.

The most active of the five girls, she is basically the team's mood-maker. A genius with excellent athletic skills. Also has perfect pitch. Sometimes waxes a bit philosophical, but on the inside she is a cute girl that acts her age.

Has great linguistic skills, and is the only girl that can understand the language of the self-proclaimed Pleiadesian. Has knowledge of all sorts of languages and fortune-telling methods. Seemingly reticent and indeed speaks little, but is busy with the research and development for things that can be of help for everyone.

Subaru and crew call it "President" as a nickname. In order to repair its broken spaceship, it called Subaru and crew to help it out. Seems like nobody other than the five girls can see it, though...

A boy that always is there alone within the mysterious greenhouse that Subaru wandered into. Seems like he is somewhat out of this world, but is someone that pushes Subaru forward subconsciously.