Underground Universe

Finally I'm posting this!  
Ok... this is a crossover (AU?) that I was planning to make a while ago. And just saying... this has NOTHING to do with Jaspertale! I started this drawing before all that XD

In this, Gems and Humans used to live in the surface... there was the war and the humans won. And now the gems are trapped underground.

Connie is the fallen human (cuz she's the only human - excluding Greg - that has real contact with the gems).
Steven is Papyrus, because.... come on! It's sooo fitting! X3
Amethyst is Sans _{because she looks good in that clothes}  Because of her personality. She looks like she's just a funny charactere but she can be really serious sometimes. _{"On the run" proves it}
I was divided about Pearl being Alphys or Undyne... But I really wanted Peri to be Alphys, it would be more fitting than Pearl, and with this, the amalgametes being the fusion esperiments would make more sense.
And Pearl and Undyne have the same weapon, they both learned how to fight, they're both soldiers...Anyway Pearl looks cool in armor XD.
I wanted a canon couple to be Toriel an Asgore... and I think there is only Rose and Greg, and Ruby and Sapphire.
I can't deny that Rose would be a GREAT Toriel.... but that would make Greg Asgore... not really fitting... And only gems live in the underground. So... No.
I know that Ruby and Sapphire can't stand to be apart... but let's pretend that they can. XD (I accidentally made them too tall here... )
All the dogs are variations of lion (I want to draw this someday XD) 
Mettaton is Sardonyx and no one is going to tell me otherwise!!!!!!!!  

There are things that I still need to decide... like, if fusion is going to be a thing and if Steven would be half human.
And more important things, I want Asriel to be, like, cotton candy Garnet  But she would be a kid. A curious, quiet kid. So in this AU would be possible to gems to have children... or something like that?
I'm still thinking how little Garnet would become Flowey... Anyway, I still need to decide this details...  

EDIT: Forgot to say... there is no genocide route in this... Connie would take Sapphire's advices in the beginning very serious. (Like she took Pearl's in Sworn to the Sword).  

Hope you like it!

 AH! IMPORTANT THING!!!!!!!!!!!!!!!!!!!!!
I'm going on a small hiatus of 2 weeks. Tests are comming and I need to study. XD 
I try to take a little time to answer comments XD
See ya soon!