I had a chance to work on the character designs for Sonya and Sasha for the "Fear Them Not" demo. They are two main characters in a co-op game we worked on with a group of my classmates.
I imagined Sonya as the more fearful one, often having nightmares at night that she projects into the real world, while Sasha is braver and mentally stronger brother, who protects his little sister for her imaginary monsters.
I spent a long time searching for colors that would best reflect their personality. Sasha's colors are predominantly red, while Sonya's are blue, with them having secondary colors of each other's main colors.
I also had the opportunity to be a motion capture actor for Sonya, performing animations such as idle, walking, dying, hitting an enemy and even high-fiving Sasha.
Sonya walk animation video