Justice for The Side Character

Celestina Ashdown is a side character in the novel "The Prince Lives For Me". She's the character that Liliana love the despite being a side character. But why is she suddenly inside Celestina's body? ------------------- "Nobody can touch my daughter. Cut off his wrist." "What are you talking about? Celestina is a peasant? I'll make you a peasant." "How dare you bully my sister." And why are all the villains so eager to see her?