Aki Nijou

Apperance Aki is a beautiful and curvaceous, fair-skinned young woman who is rather tall. She has light brown eyes (purple in s2) and waist-length blue hair, her "hair-intake" style features a single or a couple of cat-ear like protrusions from above her head, resembling the appearance of turbo air intakes that stand over the hood in some performance focused cars. She is noted for having the most largest bust size, along with a small waist, and wide hips.

Aki typically wears very revealing clothes; her usual attire includes a long white lab coat which she keeps open, underneath she wears a low-cut pink top showing much of her ample cleavage, a short dark red colored skirt, and white heels. Her underwear includes a light-colored lacy bra and light green panties, the panties being visible when her skirt rides up. When dining at Macaron, Aki is seen in a more casual outfit: a light pink short sleeved button-up blouse with a dark skirt. Her main accessory is a teal eye necklace, which is actually her Maken's physical form.

During the Maken-Ki welcoming party at the hot springs, Aki sports an extremely thin, light green sling swimsuit. While participating in the chicken fight competition, she competes in a blue and white one-piece school swimsuit.

personality Aki is one of the most compassionate and gentle figures in all of Tenbi. She is often seen assisting students, especially Takeru Ooyama, dedicating significant time to help with his training and monitor his well-being. Aki takes her role as the school nurse seriously, performing various medical treatments to the students as well as simply helping out when needed, such as instructing classes and providing transportation. She is shown to be a very naively immodest person (i.e. a clothing klutz) when situations arise. A running gag of this personality quirk of hers is the fact that she is constantly shown revealing some part of her body - most commonly her panties - unintentionally.

Aki is considered to be a beautiful woman by many of the males throughout the series, and even some females appear to be envious of her body. Despite her maturity and attractive physique, Aki has never been in a relationship and is a confirmed virgin. She is rather self-conscious of this unfortunate fact, evidenced by her strong reactions when her virginity is revealed. Aki's purity is what leads to Takeru Yamato abducting her in order to use her body to break the seal at Amanohara. In Maken-ki! Two, her mother frequently tries to arrange marriages for her, which Aki constantly refuses, preferring to sort the matter for herself. After spending time with Takeru and hearing his many compliments, she starts to question whether she would be a good wife. Takeru later explains just how amazing she is and that he would marry her, giving Aki a lasting boost to her self-esteem.