Okay so this is really dumb but like What if Tenna's pipis just hatched into a worm on a string. It's not even that far-fetched given the sheer amount of pippins in TV World. Surely Kris or Asriel had some sort of fuzzy worm at some point, right?
Anyways this is my headcanon now, you guys are never seeing the fanchildren again lmao