I have a few Ladyboy friends who know Areeya and from what I hear, Areeya has had a fair bit of facial remodelling through silicone injections and possibly narrowing of her nose. Check out some of her close up facial pictures and you'll get the idea - cheek bones and chins are very popular here in Thailand. Her breasts are also implants. The rest of her figure is very slim and fairly boy-ish - no bad thing.
So, my assumption is that she hasn't taken the hormone therapy route. Hence, everything works as nature intended.
In short, awesome!