To help understand this book and universe is that it is a Gravity falls and Undertale crossover whereas the Dreemurr children (Asriel,Chara and Frisk) take the place of the pines twins

Chara and Frisk are not twins, they just look alike

Because in this timeline the barrier was never made, so monsters now freely roam except the 'supernatural' beings like the gnomes and unicorns of gravity falls who are not categorized from the underground but instead gnomes and Etc are called the supernatural

Frisk acts more like Mabel, which means is that they are energetic and loud and well... You know the rest

Both Chara and Asriel takes both Mabel and Dipper's personality as in they both have interests in books and art while enjoying mysteries and pranks

Chara's pronouns will be "they/them" but in reality Chara is actually a girl but is snarky and is commonly mistaken to the other gender,which they don't mind that much

Frisk's pronoun are "they/them" and is transgender but perfers gender neutral pronouns

Asriel is obviously a dude...

Sans will take Stan's place,the mystery shack will be order as he and Papyrus owns it

Papyrus doesn't know about Sans making a portal but he still remembers their dad, [REDACTED/

humans and monsters mingle and live together as Soos and Wendy both work for Sans even if the mystery shack buisness sometimes suck

Blahahblah blah, get the main idea? Then last explanation is that the Dreemurrs takes the pines twins place plus: humans and monsters have made peace except that Gaster is 'dadster'(it's an AO3 tag) and is still in the void

And instead of California they live in Ebott City and stays at gravity falls, Mt.Ebott and it's City is just beside gravity falls

That means there are a lot of monsters that live in Gravity falls and the examples are: Sans,Papyrus, the dog squad, some wish's and etc. Undyne and Alphys to live at Ebott City but they have a summer home at gravity falls

Also it is a stated fact that Chara can knit, because why would Asgore's have a hand knit sweater that says 'Mr. Dad guy' on it

The first chapter will be 'tourist trapped'

Also I might need a Co-author by the way in the quotev version