|Relatives||Reiko Furuya (Mother), Jun Furuya (Brother)|
Hotaru is a small girl with purple eyes, and long, hip length indigo hair which she prefers to wear as 2 low ponytails.
Hotaru is shown to typically be very kind and sweet. However, she has a big brother complex and will become rude, aggressive and childlike whenever a girl tries to flirt with her brother. She is somewhat gullible and is prone to be teased by Yuki Minagawa - a trait that she shares with her brother.
Some of the male students in her grade, such as Chihiro Souma, are scared of her because of her aggressiveness.
Jun is Hotaru's older brother. She has a big brother complex and is extremely possessive of him. She doesn't think that any girl is worthy of him and wants to stop any girl from getting close with him.
However, she sometimes gets annoyed when Jun treats her like a little kid.
Yuki is the girlfriend of Jun; Hotaru's older brother. Due to her big brother complex, she dislikes Yuki. Hotaru often says that she hates Yuki, and tries to get them to break up. She thinks that Yuki is tricking her brother and that she actually has a nasty personality.
However, after a while of being with Yuki, Hotaru seems to be gradually accepting her and begins to think that she isn't all that bad.