So, she is spoiled because her mother the queen never gave her the attention a child needs, huh. And yet, the queen meets her younger sister, which mean it's a child between lovers. I hope MC realise this and makes a 'revenge' towards the queen for not giving her the attention she needed...
Let see, so her ancestor is the only remaining of the 3 evil mages, thor is one of the savior's knight, I bet the savior is somewhat related to her, maybe the one who confessed to thor in the other world? and ofcourse she would be the villainess in later act.