Noelle definitely wants to get in on this action! ^w^ I like the idea of Alphys being Noelle's mentor and Undyne being Susie's mentor. The personality traits line up perfectly. Also, Susie is a lot like John Bender from 'The Breakfast Club' and also KINDA like Sawyer from 'Lost'. If Toby wanted her character arc to resemble Sawyer, then Undyne would be the perfect mentor to teach her how to focus that energy toward a noble cause, just as Sawyer learns to do throughout the story of 'Lost'. An individual can do that on their own, but it tends to go faster with a mentor because, you know, "the wisdom of experience" and all that sort of thing.