Imagined as if I was a half gem. I decided I'd be a half human/gem hybrid, with the gem being 'Kyanite', and it would be behind my left ear as shown. My left ear was actually folded over when I was born, and doctors taped it back to force it to sit the right way. This resulted in my ear being slightly pointed compared to my other. It's not very noticeable unless one is looking for it, but it's something that's made me unique and I love it. My mom used to call it my 'elf ear', whereas my dad used to call it my 'vulcan ear' like Spock from Star Trek. This is why the gem would be behind my ear. :3
I wanted to color this more, and I still might. But I wanted to keep it true to the SU style. A style that uses defined lines and simple colors, but a cute style nonetheless.