Sachi is the third Tachibana child and the second girl.
The most colorful out of the five, Sachi wears an a white polo with orange stripes at the top and bottom, making the white portion form a square with a blue skirt. She chooses to wear red sneakers as her footwear of choice. While at the beach for their reality show, Sachi wore a plane navy school swimsuit with a pink pool doughnut float.
Sachi is the second girl in the family, taking over most of the responsibility of watching over Takahiro, seeing what the matter was during his temper tantrum in the dressing room. having the job of putting him to bed during the night her mom was murdered. She was the last family member to speak with her mom, being assured that she would do all she can her her and her other sisbilings.