E9 is a character in the yuri series Valkyrie Drive: Mermaid . An easygoing, mysterious, obedient and airhead Soldier Arm who is an extar that is chosen for the enhancement program that causes her to become not only a stronger weapon that was artificially modified and enhanced, it also allows her to create a weapon for themselves, and she can freely use other weapons. She have a green-colored symbol under her right eye.
- With touching some girls to scan and detect the Extar whom activated the Valkyrie Effect, she stated that she'll tingle them a little bit for the Drive.
- Episode 11 minute 19: 21 she was taught a stiff lesson by the Gouverneur Charlotte, with sharing a french kiss, and her breasts to be jiggled and her nipples to be pinched to enter the needed Drive to capture Mirei as requested by the organization.
- She was satisfied with blushed cheeks and her hands placed on her chest for witnessing Momoka's sadistic side in her saying the purpose of her actions was to kill lots and lots of people using the Arm weapon of Mamori to do what Mirei hates most.
- Without the requisition to be physically close to Momoka in order to Drive, she accomplished her Drive as ordered by her while being distant from her.