Mika Natsume

The daughter of Prof. Natsume, one of Daguva's victims, she was greatly depressed when her father's murder was being overlooked for the Gurongi attacks, taking the findings her father had at their house. But after Yuusuke reasoned with her, Mika decides to aid in the Gurongi matter as Jean's assistant. However, she is unable to follow and decides to take up playing the flute her father gave her. But while attending the 12th Arikawa Group Flute Competition, a hostage situation by a disgruntled government worker traumatizes Mika as Yuusuke tells her to not to run from her fear and continue. Three months later, Mika is attending a special college.

Novel
to be added

Kuuga (Prototype)
Years after the end of the series, Mika found a prototype Arcle which was created earlier than Kuuga's but is incomplete because of lack of the Amadam, which causes the user to go berserk. The previous user went crazy and the belt was sealed inside the Coffin of Darkness (Kuuga Arcle was sealed was labeled with Coffin of Light).

Wearing the belt, she transformed into a version of Kuuga with some minor differences, such as smaller horns. As the prototype Kuuga, she has two forms, one white and one black.