Critique my characters?

aight i have a few comments

1. dyslexia is more of a genetic thing than a result of poor education, but it would definitely cause some conflicts when being taught by someone who doesn't know how to help you work with it
2. remmy's really tall, which isn't impossible, but it's kinda unlikely,,,,, you don't need to change that lol i just noticed it and decided to share my thoughts
3. why did remmy and his sister go to the usa? how did that get arranged? (maybe they went to live with a distant relative or a family friend??)

other than that stuff, they're really neat!! it sounds like a super cool story, well done :)