Shiruku Koharuno

The main heroine of the trio. Although very shy and reserved about her new duty, she is the first of the three to demonstrate their new powers as UFO-man's successor, growing into a giant heroine. Only minutes after the transformation, she discovers her unusual battle suit is deteriorating little by little, until she is totally nude. She has a crush on Tsubomi's older brother Makoto, her senior classmate and school photographer. She is referred to by the crowd as "Little Boobs".

(Source: Wikipedia)