If she starts coughing he's way more likely to whip up some homemade cough syrup okay. Also lbr he's from a canon that's basically got the aesthetics of Tim Burton meets Gorillaz so plague doctor masks are cool, so that automatically makes her a cool old granny (she's also old enough to be his grandmother so that amuses me)

And he doesn't even like cutting up dead things, they're way more interesting alive.