Thomas' Old teacher before she went MIA was Terrafta Vale.
Always the one for action and always one to bring the fight for those who couldn't defend themselves Vale was considered Mama bear of R.O.D before a mission ended with her and her entire squad considered KIA; All except Thomas.
Although her body or her mech where never recovered a lot of members of The Pack never where able to be identified after Taran's treacherous act.

Rumors though the Mek-net that Vale still lives and is the founder behind MAUD. Speculation at best and R.O.D reminds staff the dead should be left to rest in peace.