Black Albertina

Albertina is the maid of Princess Albertina. She was born from an affair the king had with her mother, the court sorceress, who was executed by the queen for this betrayal. This left Albertina with a lifelong hatred towards Princess Albertina, which culminates in her demanding to exchange places with the Princess before arriving at prince Christ's castle. Christ calls her "Black Albertina" due to her dark hair and unpleasant personality.

[Spoiler] At the end of the chapter it is revealed that she is actually the real Princess. [/Spoiler]