For Fellow Undertale Fans

What's your favourite AU out of all of them? This includes the original Universe as well by the way. I also include re-tellings of the story such as comics that attempt to fill in the blanks and progress the story after the events of one of the original endings. My favourite is Underline, because Chara is best pony human. I recently caught up with it after ages of not reading. Holy hell it gets hard to follow at times, but like a good story should do it ties up most loose ends later on.

The only thing I'm confused about still is how Chara is still in contact with Sans somehow. Sans has a random daydream seemingly competely out of nowhere and outside of the flow of time where he talks with Chara on the surface. It's unlikely to be just a dream, as Chara's dialouge suggests they have experienced significant time between their last death and the so called 'dream'. Which makes sense as Sans and Papyrus have basically skipped a ton into the future and erased themselves from the past up until the point of their re-imergence to somehow solve a problem with the Underground falling into the void due to Determination experiments. So yeah. Somehow Chara can still communicate and it's really weird.

Go check out >Underline< if you're interested, you won't be disappointed.