I - like may other writers - keep a Pinterest board for my writing projects. I come across a picture that fit a chracter, a setting, some clothing, or a fact that I might need to research deeper as the story goes.
I also collect quotes. Yes, I have a separate board for general quotes, but I'm thrilled each time I find an actual quote that fit a character. I might not use it, but some times it feels like it could have come right out of his or her mouth.
This quote is so spot on. Akir has a tendency to never make excuses, never admit that he's take on to much or that he's been beaten down. He'll always get himself together and push on, refusing to believe that anything can stop him.
Mateo, on the other hand, is a bit more on the realistic side. The one to the right could be an answer to the way Akir behaves, again and again, in the story.