​Despite coming from a well-to-do family, her life with them is very difficult because of various problems. Her parents are divorced and her father has chosen his new wife over Taiga, forcing her to move out and live in an apartment by herself. However when her father's business goes bankrupt and he rans away, she is left in the care of her mother who has also re-married and now has a new family of her own. Taiga has difficulty getting along with her step-father and half-sibling. It is also said in the last chapters that she is too afraid to return to her mother because she has fallen  pregnant again and fears that since she is "sure to have a tall child" she wouldn't fit in and would just be a burden to them.

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After accidentally giving Ryuji an evelope that contained a love letter that was meant to be for Yusaku Kitamura, she breaks into his home in an attempt to reclaim the letter and wipe out Ryuji's memory of ever reading the letter. But when Ryuji tells her that the envelope was empty she stops.