Xoc-
She never met her older sister, and only saw her younger sibling when he was with Itzli and she went to visit him (for whatever reason).

Jorge-
His favorite past time is paintball wars.

He takes a certain amount of pride in his skill at it and rarely, if ever, backs down from a challenge.

Allen-
He has a certain degree of hearing loss, due mostly to living in a big city for so long.

Mazatl-
He hates the sound of his own voice.

Which is about 1/5 of the reason why he doesn't talk a lot.