|“||I'm just gonna have tons of fun now so that I can have all the great memories!||”|
Michiru Hyodo (氷堂 美智留 Hyōdō Michiru?) is Tomoya's cousin and childhood friend, and by far his longest standing friend. She is a student in class 3, in the second year of Tsubaki Girls' Senior High School (椿姫女子高校 Tsubaki Joshi Kōkō?)
Michiru currently attends a girls high school and used to be part of all kinds of clubs on campus but recently started an indie band called Icy tail. She is preparing for her live performances every day. Michiru composes the music in the game by Blessing Software.
Michiru is a tall girl with short, purple wavy hair, dark blue eyes, and large breasts. She is in her school uniform most of the time.
She is also seen wearing casual clothes. At Tomoya's house, she wears a short purple tank top and a pair of extremely short jean shorts.
She would have been a well-rounded student if not for her poor academic performance. She is fickle and naturally good at anything she does. Tomoya once noted that Michiru had a lot of useless talents.
She is not interested in anything but her band and music, and enjoys playing the guitar. Michiru had a prejudice against otaku culture and wasn't happy about Tomoya being an otaku and tried to get him out of his 'nerd phase' until Tokino, Echika and Ranko told her they were all otaku.
Michiru is kind and caring, but she can also be childish sometimes. She also seems to be naturally cheerful and kind, as she is usually seen with a smile on her face. However, she also has shown to be serious and mature.
It is hinted that she has feelings for Tomoya, though its not completely clear due to her slightly impassive personality. This was shown when she misunderstood Tomoya when he said he wanted her, meaning that he wanted her to make the games music, but she interpreted it as wanting her body and love. Yet she didn't reject it, stating instead, "It's not as if i'm not interested, and I doubt it'd be terrible with you. Well, I supposed that wouldn't be too bad." This further proves that she harbors feelings for Tomoya, considering she thought a first time with him wouldn't be so bad, but it's still not confirmed.
- Being born on the same day and the same hospital as Tomoya, she has developed a very close relationship with Tomoya and often expresses their understandings for one another physically but neither of them care that they are of the opposite gender. Michiru likes to play around with Tomoya, like she did in the lake.  However, it is hinted that Michiru has feelings for Tomoya, but due to her stoic composure, it's not clear if she holds any feelings for him.
- Michiru is actually very good at ping-pong.
- Michiru is the tallest girl in the series.
- Michiru is the only heroine in the cast to have seen Tomoya Aki completely naked.