Tsumugi Shiraui

A gauna/human hybrid created by Kunato Developments for fighting against the Gauna. Similar in size and appearance to a guardian but having a gaunalike appearance her prowess in combat is rivaled only by Nagates. She becomes friends with Nagate and Izana usually interacting with them at their house by a tentacle she sneaks by the vent system while her main body stays at her hangar. Source: Wikipedia