undertale: so i had this headcanon that frisk was actually a descendant of the sorcerer who raised the barrier
not sure if this would work within the eriverse though
That could possibly work. Though with the Eriverse I think it would be more of the monsters/entities creating a domain to run away from the world rather than humans pushing monsters/entities into the underground during a war.
It very much could be that though! I do think it would be neat if humans who have mastered the ability to create personal domains and veils would be able to create permanent domains attached to certain areas.
So perhaps a new type of magic user (a mage, stemming from Frieren) was making domains that could be entered by not exited and forced entities into those specific areas. There would be multiple of these but it is the Undertale domain that has stayed the longest (or possibly all domains like that are connected in some way as domains are pocket dimensions within small "real" spots in the world, which would allow for the different biomes and stuff to happen more naturally as single domains tend to be single environments).
If that is the case, I would actually really like it if Frisk was born from a human mage, possibly they would have elf blood in them? Elves would be a type of elemental I think? Or like an elemental who is mixed with entity blood but isn't considered an entity.
I still need to think about how I want elves and stuff like that to play into the Eriverse (I am watching Dungeon Meshi with my brother-in-law so depending on how that deals with elves and how Frieren deals with elves, I'll make my own version of Eriverse elves).
So this could absolutely be a cool lil tidbit that Frisk is related to the sorcerer who raised the Undertale domain barrier! If that's the case, I would also like it if Frisk was related to the Gojo clan as well which would related them to Yuta too! All this because I want Rika (Pokemon) to be a distant cousin to Frisk because it seems fun!
Also, speaking of distant relatives, I am thinking that Ubel (Frieren) is a long down ancestor from Ogata (Golden Kamuy). My friend joked that Ogata has Ubel eyes and now I want them to be distant relatives (over 1200 years have passed but I find it fun to make lil connections like this for some reason).
So yea! I'm probably gonna replay Undertale (and play Deltarune) at some point. When I do I'll work more on that part of the Eriverse, because I'll be honest, it's been a very long time since I actively touched anything Undertale related that wasn't connected to Underfell (my fave AU). So I absolutely need a refresher on canon content and not just what fandom has created.