Lazul is training to become a priest of Anubis, like his father (the High Priest) and all of his brothers. He would love his family to appreciate him at last and accept him, but he's very much the runt and his lack of confidence means his skills in magic are quite poor. He's also just, well, a bit too nice for the whole death worshipping cult thing.
If I'm ever feeling annoyed when I'm trying to draw, doodling Lazul always makes me feel better.
As an extra, here is a panel I'm currently working on. I will be posting it's progress until it's complete!