Proctor Ingram is the head engineer of the Prydwen. She lost both of her legs from battle in the Capital Wasteland. Her power armor station was atop a cliff, when a mini nuke explosion caused the cliff to collapse. She fell from around one hundred feet, destroying the power armor she was wearing and crushing her legs beyond repair. Proctor Ingram uses a modified power armor frame for mobility after the loss of her legs.
Although Ingram's power armor frame is supposed to be heavily modified, it uses the same world model as all other power frames. This may indicate that the modifications are to the frame's control systems rather than the hardware itself.
If the Prydwen is destroyed in Rockets' Red Glare, Ingram's body will appear at the front of the airport wreckage, even if she was killed aboard the Prydwen. This is likely because she may hold the network scanner which would be needed to get into the Institute, if one decides they want to side with the Minutemen.
Despite her fusion core being clearly visible, it will not turn up in her inventory upon pickpocketing no matter the perk rank. Similarly, you can target her core in VATS and damage it with attacks, but it cannot be destroyed like that of other power armored characters. This is to prevent the possibility of her stepping out of the armor, which would be impossible without her legs.
The "setrace" command can be used to get her out of her suit of power armor. Strangely, she will walk around and execute several idle and conversation animations that are impossible to see when an NPC is in power armor. This does however make it impossible for her to board the Vertibird to start Spoils of War. To fix this, one must use the "recycleactor" command to get her back in her armor.
One can use command "unequipitem" on her power armor to get rid of it. Then, Proctor will walk around as usual, but her model would be really ugly with strangely corrupted legs and hands unproportional.