Mahiro Oyama, she was originally a male, 20 years old. But after her little sister Mihari Oyama tested the drug on him body. Turns Mahiro into a cute and adorable little girl for her age 14.

As a male, Mahiro had short pink-gray hair an orange brown eyes 

As a female, she is shorter than her sister and has a smaller body. Mahiro's hair is now mid-back with a single strand sticking out from the top and two longer strands falling down the front and covering her ears
*She is now 144cm tall, 38kg*