Fair warning, Bella's character is lovable in episode 1 (when she and Puttipat still haven't met) then they'll have this whole damsel in distress dynamic, it's annoying you'd want to throttle her. BUT it gets better at the end of episode 4 onwards. That's my opinion. I don't know if it's going to work for you and
@PrincessKarina too. The heroines in the Jutathep series aren't really written well, except maybe for Soifah who has more spunk than the rest.
Mew's character is pitiful and spoiled but that's supposedly part of the whole Pawonruj x Rasa love dynamic as Chai Ruj comes off as this sweet doting lover archetype who will be loyal to her unlike the Noble bastard that is the villain (It's a question of who is more "noble" - one who is noble by blood or one who is noble at heart. That is the central theme of Khun Chai Pawonruj) While Rasa is the one who will love him no matter what. (I.e. her theme song which goes something like "You're not perfect but I love you). The acting of Mew gets better after they return to Thailand. Note also that Pawonruj is the longest part with more than 10 eps.
Chai Pat, surprisingly would be the chauvinist ass archetype. SERIOUSLY. Feminists will be lining up to whack him on the head hahaha. Except he's too cute so he gets forgiven hahaha. his theme song is the one that goes "I am a man who would fight for your honor" (Chicago's Glory of Love) hahaha so Kaew comes off as a damsel in distress in some parts to feed on this. I'd say off all the brothers, Chai Pat is the most traditional and old skool. (Read: anti feminist). Although his alphaness is downplayed since he's the nerdy one who is a "virgin" so to speak, in terms of love.