Need advice on a rolling ball Tecnique

Hey folks!

My first post, Making a new 2d Platform game for personal use.
Main character is featuring a sheep. I want to turn her into a woolen ball when she rolls and jumps.

I got the main locomotion sorted like walk and jump.

But i am a little bit confused now on how to turn her into a piece of wool when she does a roll or jumps in the air.

Think Sonic the hedgehog style except she is soft and not spiky lol

Thank you in advanced.