Soleskiss is Alice Theory
So, I've posted multiple theories of mine already, but I just have so many of them.
I think that Soleskiss represents Alice in both the fever dreams and purgatory for multiple reasons. One reason I believe this, is that Soleskiss' original design had her as a brunette, this was later changed to blonde. And in one of the episodes of Mother, I believe either Father or Alice, we can see Alice asking Mother to be able to dye her hair Blonde in one of the tapes.
Another reason is that we know Soleskiss is dead, considering her being in purgatory, and despite her having a similar personality to Olivia, we see in Wasp! when Soleskiss refers to Olivia as a brat, that they aren't the same person. So, since Alice, as we know, is dead, she could be represented by Soleskiss in purgatory, looking how she would've wanted to when she was alive.
My last reason is because Soleskiss hates Bald Boy, and yet she's constantly hanging out with him. Bald Boy is pretty much confirmed to be David in the fever dreams and purgatory episodes. And because David did unspeakable things to Alice, I think Soleskiss, or Alice, is there to constantly be a reminder to David of what he did to her, and yet, because he was obviously attracted to her, but also hurt her horribly, even in his dreams where she torments him, in his own sick way he may want to continue being close to her, whether it be because he's attracted to her or because he thinks he deserves the punishment.
If you have anything to add onto this, I'd love to hear it! :)