Tamao is a beautiful young woman with long straight blonde hair that is clipped back by three light blue beaded hair clips and grey eyes.
When she visits Ranmaru at the mansion, she is seen wearing a baby-blue knee-length dress with necklace. At school, her top uniform is white with a ribbon in the middle of the sleeves, while the bottom part is a navy-blue skirt.
Unnamed and known in the manga as only as "Princess" until Chapter 111 where she reveals her name as "Tamao" for the first time. It is revealed that Tamao is the fiancée of Ranmaru Morii because of an arranged marriage by both their parents.
Aside from hoping Tamao's calm demeanor will change Ranmaru's womanizing habits that sometimes get him into trouble or heart-broken, both Ranmaru's parents are extremely fond of her that they would like her to become their daughter-in-law. Despite Ranmaru's playboy qualities, she has fallen in love with him, to the extent of admitting her feelings. His rejection of her does not faze her, hoping that eventually Ranmaru would come to eventually feel the same way. That confession made Ranmaru become attracted to her as her determination is what started to make him have feelings for her.
However, Ranmaru broke her heart when she caught him with another woman and it caused Ranmaru to have extreme guilt for his womanizing actions. But, she couldn't bring herself to hate him as he is her first love, which makes Ranmaru realizes that his habits of flirting with women are out of control. Ranmaru thinks that if he and Tamao get married, it could lead to a miserable marriage if he continues down this path. So, he starts to change for Tamao's sake.
- The name Tamao means "gem, jewel" (玉) (tama) and "thread" (緒) (o).
- Tamao's surname Kikunoi means "chrysanthemum" (菊) (kiku), "this" (之) (no) and "well, mine shift, pit" (井) (i).
- Tamao has a older or younger sister.
- Main article: Tamao Kikunoi/Gallery