I don't know if this character info is spoiler, so just in case.
Spoiler
She is an asian girl who is very much into tech. Her idle animation is to sit down on her knees and text. She has a purple power button painted onto her armor as well as a panda hanging near her shoulder.
On Phobos she is between a maintenance tunnel and a pile of rubble. You have to go down some and then eventually enter a tunnel over on the left. You then make your way up to her location.