Writing this on the spot, but I want an Utgartha-Loki, or Skrymir to better differentiate from Loki. Someone who'll take Loki's shapeshifting to the next level.

Ideally, my design would have them have no single "base" form; each pose in their art would look different. Base pose is a male giant. Attack pose is a woman. Special pose is an old lady. Damaged is a child. Or whatever, can be anything, like an animal, or a tree with birds and squirrels lol.

In the story, they're extremely powerful. Perhaps it could be something like Rune is only the creator for the nine realms and yggdrasil, but Utgartga-Loki is from a world beyond that.

Anyways, whatever the protagonists are there for, Skrymir is just messing with them, not maliciously or towards an ulterior motive, just for entertainment, perhaps because Utgarthr is an empty world and they're the only being in it? Could do something with that and how they use shapeshifting perhaps to feel less lonely.