To be fair, I think
Rainbow Dash meant to say that choosing a spelling that's unusual in certain locations and then getting upset when people don't pronounce it right (because they're unfamiliar with it) can be a bit absurd.
I'm sorry, but I agree (not saying this to Haeri specifically, but in general). I don't know where Haeri lives, but if it's the southern US, or US in general, I'm not surprised.
Rhys is not a common name here, especially in that spelling, when most people are familiar with the name because of
Reese Witherspoon.