Shirokawa Hikaru  is a first-year student at Kamiyama High School. She is the leader, keyboardist and composer of Togenkyo.
Hikaru is secretive & taciturn, but polite to people she doesn’t know. She is always quick to brush off attempts to communicate with her. She dislikes revealing much about herself. She can also be very cold, especially to people that she has cut off. She can also be described as a control freak and is a perfectionist. Whenever things go astray, she tends to act unusually