- Voiced by: Kissho Taniyama (Japanese), Kevin M. Connolly (English)
- Dude, She's Like, in a Coma!: Takayuki to Haruka, only instead of kissing, he tries to take her on a date. While she's still comatose.
- Faux Yay: Takayuki on Shinji in episode 1. Shinji is less than amused.
- Tomboyish Ponytail: Mitsuki is a sporty, more tomboyish girl compared to Haruka, so she gets the ponytail. She cuts it in the end though.
- Can't Catch Up: Haruka lost three years of her life, staying the same as her friends grew up.
- Anime Hair: DAMN, that is some crazy hair, Mitsuki.
- She cut it short later though.
- Voiced by: Tomomi Uehara (Japanese), Leah Clark (English)
- Genki Girl: Before the accident.
- Voiced by: Makoto Aoki (Japanese), David Wilson-Brown
- Voiced by: Kyoko Yoshida (Japanese), Monica Rial (English)
- The Klutz: She even has band-aids all over her face. Which makes it a little weird that it took her quite some time get fine one when Takayuki cut his finger in the anime.