no, not red sonja, this is a totally different redhead in a fantasy setting (will I get in trouble if I say who?)
anyway the concept here is that she is essentially invincible but she has no other power so she is being tested by the magician that owns this castle to see how skilled she is as a thief and he tests a new mutagen on her by blasting a load of it into her face and tits, with a shotgun or something I dunno, we never find out if she was any good as a thief