I was thinking that a wasp motif cold really fit Gremory if it’s used right. If mammals are a consideration for vepar, narwhals might be an interesting counterpart to the unicorn. Sticking with the aquatic theme, it for a poison heavy vepar route, have you considered her sitting on a large anemone for when movement becomes… challenging. With a few prominent tendrils in the design making her method of attack visually clear?
I'm actually holding off on insect themes just in case I get around to uhhh something else.
But Vepar's poison-heavy route (Creeping Death) will give her a blue-ringed octopus aesthetic with barbed tendrils, so she'll maintain a clear method of attack. I like the anemone idea, though, I may use that for her base buildings or something!