Gekkou

She is a second-year student at Gessen Girls' Academy. Like her half-sister, Senkou, she pretends to be a perfect student in Middle School and is thus admired by her schoolmates, through that side of personality is mainly a facade to hide her true personality. Being the friendly half-sister of Senkou, Gekkou is known to have a most likely positive, tough and kind personality, even through she isn't less fanatic and brutal in term of way to achieve to her objectives.