"I mean, if not me, then who?" Frisk takes a large bite out of an apple, expression thoughtful. "There's no guarantee that the next person who fell down there would want to try and get the monsters out. Hell, if things went really bad, there might be another Waterfall Incident. Plus..." Ah, fuck it. They'd already told Kuja, why not Baiken? "I had this... power down there. Basically, every time I died, I'd go back to a point in time and space, fully healed, just because apparently I'm too stubborn to die. I could manually reset too, if I tried hard enough. The ability to retry and fix my mistakes, plus survive if Undyne got a few lucky shots in, is basically the only reason I made it as far as I did. There's no guarantee that whoever fell down next would fall assbackwards into SAVE-ing, and no guarantee that they'd use it for good. So, if not me... then who?"