Misaki Raika

The protagonist.

She cross-dresses and transfers to an all-boys school to find out the truth behind her brother's death.

At school, she changes her surname and goes by the name Misawa Rika.
For better or worse, she has a straightforward personality, and is the type who acts before thinking.

She wraps a cloth around her chest to hold down her breasts.
She doesn't think of herself as feminine, and this poses some complexes for her.