But caliborn didnt predominate properly. Thats why Caliopes ghost exists in the first place.

He didn’t Mature properly to predominate over her- Like with so many other things he sorta cheated his way around how things are supposed to go and predominated by killing her Dream Self. That’s the thing though- He didn’t ‘predominate wrong’, since his cheeks did fill in, he managed to predominate over her. What he did was predominate early, ensuring he would never actually mature. Calliope exists as Dream Callie most likely because her Dream Self was killed- He consumed the Calliope within him, but by killing Dream Callie, he gave her an escape route from total oblivion, just because he wanted to get things done faster.

In a way it’s all an intricate set-up for a Neverending Story reference, with the Cherubs and the Auryn being linked so closely, the lack of maturation vs the ‘Childlike Empress’, there’s. A lot to unpack about the Cherubs.