Ooh! These are cool designs! Nice job!
Raheem looks pretty quite and like they're careful around others. Although, the blue form that they have looks really intense. I bet they're serious when they take that form. (Assuming that's a form they take.)
Yami Hassan looks like he means business. He looks like he could be a villain. And if he's not, he looks like a character that's very noble and strong. Kind of like the Aragorn of your story.
Nadhine Anahita looks very sleek, and like she'd be a thief. At least, that's based off of her outfit on the far right. I wouldn't be surprised if she's someone that knows how to outsmart everyone.
Esther Jahar looks regal and dainty. Not much of a fighter - and if she is, then it's unexpected. Which is probably a good advantage against her enemies.
I'll go ahead and post another one of my characters: