I realized that while I made the hot sister Lora, there is none of my favorite character, which is the chemist Chisato. There's also Asuka, who is really hot as well, but Chisato was actually interesting as a character, especially in the third game. Which I used as a base, since it had the best art, plus she's a bit older there.

Chisato: Chisato, black hair, twintails, yellow eyes, medium breasts

Extra: striped shirt, long sleeves, red skirt, thighhighs, zettai ryoiki, labcoat