To throw in a speculation I wonder if Terra's step-dad, Gesthal knew of all this. It's ironic/natural for a little child to be kidnapped and parents murdered to live on a happier and more exciting life.

This is the case when Terra has to rediscover everything unless I'm missing something? We can keep speculating what her life would have been had she grown up in the Esper World.

Though I have my own stories to write. I can't keep helping someone else.