**Height:** 176cm
**Weak point:** Butt

Ayana's older sister. A scientist who often acts on her whims and loves to experiment with drugs of her own making, the effects of which often backfire on her and the rest of the cast in humorous ways. Due to her infatuation with the Invisible Man, she somehow gained the ability to make herself invisible at will. At some point, she started working as the school nurse. 
When she was younger, she's drawn an embarrassing romance manga featuring herself as the protagonist, as well as used her drugs to make two of her muscular male teachers fall in love with each other.

A "science trouble" romantic comedy OVA bundled with the manga's fourth volume. It follows a high school boy named Komaba Haruki and his two girl friends: the cyborg girl Airi, and the half-dog girl Ayana. The two go to extremes with the power of science, which only gets Haruki involved in ecchi troubles. <br><br>
(Source: ANN, MAL news) 

She is a voice actress who formerly affiliated with Arts Vision and is now affiliated with Amuleto.

[Website](http://chibikuma.dreamlog.jp/) | [Profile](http://amuleto.jp/talents/sakumakumi.html) | [Blog](https://yaplog.jp/chibikuma-days/1) | [Wiki (en)](https://en.wikipedia.org/wiki/Kumi_Sakuma) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E4%BD%90%E4%B9%85%E9%96%93%E7%B4%85%E7%BE%8E) | [Anison](http://anison.info/data/person/13706.html)

A "scientific" perverted manga with a lot of tentacles. Komaba Haruki is a high school boy who has two eccentric girl friends: Hizuki Ayana and Kuze Airi. Ayana is half-dog and Airi is half-cyborg. Haruki gets involved in ecchi troubles caused by the two. <br><br>
(Source: MAL news) 

Touko Hizuki