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Anyway so creaking!Techno design thoughts:
White hair bc I can (or perhaps if you still want to invoke pink, make it a super pale greyish/whitish pink? Almost desaturated pastel? OR white hair with pale pink highlights works too).
Branch antlers or horns just for fun AND a branch crown type thing - I'm thinking similar to a flower crown except made of branches/vines/leaves? But a more traditional crown shape works too. If the hair is braided maybe some leaves in the hair I think that'd be cute. Red or golden eyes.
Honestly I'd cover other parts of his design like his arms and legs with vines/roots and leaves too. Kind of like a tree grew around him and he tore himself loose of the roots but they still stick to him.
And then in term of his outfit I keep thinking about those capes made of autumn leaves? I think he'd rock one of those. The redish colours would invoke his traditional cape! Optionally could even make it red on top and then transition into white leaves at the bottom?
That's what I have for now but I'm still thinking about him a lot-