Been working on side character designs for "Homecoming," and while doing so I thought it'd be nice if the main characters had their own mentors. "The Mechanic" was originally a pen sketch (as shown) that I came up with while at work, and I've working on her since, bit by bit.
She's a vet who was honorably discharged after losing her leg in battle, and went on to become the mentor to other soldiers. She's relaxed, but firm when teaching. She's the "Rogue's" mentor, and she taught him everything about tech.
I also like to think she's married to a drill instructor, and they both keep each other grounded.