Tsugumi

Tsugumi (緒美・つぐみ Omi Tsugumi, known as Tricia in the Tokyopop version) is the high-school aged female cousin of Keisuke and Ryosuke Takahashi. Outside of her aforementioned cousins, none of her relatives are shown. Her surname is unknown.

History
At some point, Ryosuke started tutoring Tsugumi.

After school one day, Ryosuke picks Tsugumi up in his car. Tsugumi tells Ryosuke that her summer classes aren't going well, and jokes that she must have the same dumb genes as Keisuke. She tells Ryosuke that she doesn't even care if she doesn't get into college, as she doesn't even know what she wants to do. She envies Ryosuke, as he's always known he wanted to be a doctor. Ryosuke tells her that he has to live up to his father's expectations, and that he doesn't know if he would be good at being a doctor, or if he even really wants to be one. Tsugumi tells him that he'll be a great doctor, and he thanks her.

Several weeks later, Tsugumi is at the Takahashi house. Ryosuke sends her to go and wake Keisuke up as he wants to show him a video. Tsugumi is surprised that Keisuke is so focused on the video. She goes to make coffee for the two of them.

She is not seen again after this.

Relationships
Ryosuke Takahashi

Keisuke Takahashi