Alright, I loaded my game in robotic assembly after some break and I remember I had NPC called Somah with me, she had 100% repair skill. Anyways, I blew up the generator and left the place but cant seem to find her anymore? Did she bugged somewhere in robotic assembly or something? Is this normal that she vanishes?
Right in the beginning you will notice her going to fix a teleporter and get ported by accident. She will remain in a top area that you can only access when another teleporter get active. Her pathfinding was really bad when I reach here, but don't mind, since she will appear outside as you leave the area.
There are plenty of eyecandy games out there that gave cavity in my eyes! ~ me.
She does leave and return to the surface Wastelands after the main quest if that's what you mean.
If you mean before the main quest is finished... she could just be stuck some where. I remember on my 2nd play through, she was no where to be found in the reactor area and I had to console her to me. I think she just stood in the same spot she runs to in the Sally area with the first generator. Glitch I guess.