Got the lines for Sy's shift form done so I thought I might post it! Since I don't know when the rest of the ref will be done. C: (The extra lines are just red pencil I just chose not to edit out so it'd look more sketchy hahaha)
Originally I was going to do a full sized version but, opted to draw him kind of chibi-fied instead. For one thing it takes up less space on the ref, and the other, after a specific plot point Sy (willingly) loses the ability to shapeshift at all, so you wouldn't see it after that anyway. ¯\_(ツ)_/¯ Regardless, I still think it's really cute and worth including.
A long time ago he was meant to be a winged tiger, but he has since been moved into the bucket of 'chimeric shift'. Normally shapeshifters's main animal form would be an animal that actually existed in the world, but chimeric shifts are amalgamations....in this case just a feline creature with wings.