Valerie

Valerie is first seen in a flashback with Bianca (who was a Blue Delmo then) mourning the loss of a fellow Blue Delmo during the events of A Flower Blooming in Space. She decides to cut her hair in order to pass herself off as a man named Pierre. She then uses her charm to woo Aika and succeeds (of course Aika was charmed by her looks who wouldn't be). Afterwards she reveals her connection to the Delmos and eventually confronts Aika only to be make quick work of. She gets knocked out with a headbutt which sends her body crashing against a wall. She lands on the floor on a sitting position and her head tilted forward.

(Source: AIKa Wiki)