User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-5894890-20161212174423/@comment-193.190.73.129-20161219111607

The father was someone who suddenly became disgusted with Irene's dragonification. He called her a monster because of the scales on her face and who knows where else.

This caused her to be traumatised and judgemental about appearances, which eventually culminated in her turning that princess into a rat and believing nobody would love her new appearance. The trauma is the reason she seemed so psycho when she transformed that princess.