"Don't mention it" Raph replied as he glanced over towards her, his piercing green eyes watching her before focusing ahead once more. They only managed to walk a couple of more feet until a presence came stumbling onto their path, prompting Raph to stick an arm out in front of Ava in order to stop her. He reacted completely out of instinct as he retrieved his sai and assumed a defensive position, seeming to ready to defend Ava if this turned into a dire situation. Even though the Slworm was long gone, the turtles were still a bit cautious,you never knew if there was any leftover slime writhing its way through the sewers. However, nothing could of prepared him for the unfamiliar mutant in front of him.
Judging by her appearance alone, Raph could make out that she was a female and probably wasn't one of the Shredder's hench-mutants. She was clad in some sort of lab coat that had become scuffed and dirtied, making Raph weary of her presence. But before, the mutated turtle could act, the cat woman had spotted him.
"What the-!"
The unfamiliar mutant hurried back a few steps when she saw Raph and Ava, immediately causing her to become defensive. Claws shot out from her padded fingertips and the fur on her tail puffed up, showing that she felt threatened. Even with the display though, Raph stood his ground.
"Wh-who... I swear if you're another one of Berg's, there's going to be trouble! You're not not taking me back!" The mutant cat spat at Raph, not seeming to be very trusting of Ava either despite her human appearance.
"Alright, calm down, lady" Raph told her, eyes narrowing. "I have no clue who you're talking about, but obviously something is up."