Oh yeah, schizo theory but
>Dess has a LOT of random shit in her bedroom

At first I thought it was "she tried a lot of hobbies but couldn't stick with anything" trope

But what if, she keep all of this because they are Darkners?
Like, she goes to adventures in the dark worlds, and she picks the one she likes, to make her own town like Ralsei, that's why she has Asriel stuff too, because they were actually people she knew.