echidna_(queen's_blade)
Echidna (エキドナ) is a Queen's Blade character. Voiced by Kaida Yuki, designed by F.S.. She is an elven mercenary with green haired tied into a ponytail and red eyes. She fights with a sword and shield. Her most distinctive trait is that she is practically bottomless, as she "wears" her pet snake Keltan in place of her panties.
Echidna's battle book: pool #2007