Which of these characters is your favorite?

Honestly I can't really say, but that's purely because I don't really know what these characters are like too much. I mean I like characters for their depth and emotional connection I make with them. Giving me a scant description doesn't give me much to go on. Furthermore, I don't really know what these characters are like in the context of the story. You could call someone a bad-ass, but omit that he never fights. See what I mean? I don't know the context of the characters within the story. But based on face value, I'll go with Neru, purely cause he has the potential to be the most damaged character out of the lot due to being an orphan. In my mind, which means how I want to see him, I picture a teenager who pretty much spends most of his time practicing, all he does is hone his craft. Similar to Robin in the original Teen Titans series. He spends all day doing multiple karate moves and being as silent as possible. As a result him and his sister have a strenuous relationship, kind of like Elsa and Anna did in Frozen. Often times he's alone, that's just the way it's always been. He's not opposed to making friends, he's just not going to put in the effort. In my mind Neru is comfortable being alone, because ultimately he was brought into this world that way and believes that's how everyone leaves it as well.

Also, I wish you the best of luck with your dream. Seriously, not too many people pursue their passion in life so I think you are very driven to even be on the path that you want.