Thank you! I'm the creator of that CYOA story!
I'll admit I'm tempted to write a chapter or two that uses a really obscure character, Hildagaard Rail, who has HUGE lips.
She's from the Mirage Teenage Mutant Ninja Turtles comic, issue 30, which was a guest comic and rendered non-canon.
As for what I'd use her for, probably people falling into the the Mutato-heads dimension. She saves them from falling to their doom, but she kisses them as her payment.
So it'd be a kind of a multi-crossover story. Though for Characters with some non-human DNA, I'd be tempted to have them safe from the mutating effects of the Mutato-heads dimension and thus possibly have Hildagaard keep them as her new lover.