I always did get the impression the side characters were the best part in that one.

I kept thinking Sera and the Royal Stars was going to get interesting because her father is in the process of being violently overthrown by her uncle, partly because he's not doing anything to break the curse, and it would be interesting to see Sera realize her uncle is actually supportive of her quest and maybe he was right that her dad needed to go to save the kingdom. But I don't think it's brave enough to go there, it always leans back on 'uncle just wants power' eventually.