Antoinette Ivanov is the chosen successor to the Black Crusaders after the death of her parents, Natz and Estelle, however, she was not of age at that time, so Lee took her place. She took his place after he died in Part II - Sanctuary. She was born in farther earth. She is formally introduced in Part II - Sanctuary, and is the main antagonist and leader of the Black Crusaders in Part III - Hope.

Shortly after rising to power, she mothered an abandoned half-human baby and named the possible heir (Deadname) Logan Ivanov. However, Logan comes out as transgender, and becomes Loki. This tarnishes Antoinette’s idea of having a “perfect” child, and she takes out Loki’s eye and exiles her for a year. During this expulsion, Loki meets and befriends Persephone.

Antoinette is also S’s girlfriend, though abuser would be a more fitting word. Due to the drastic power imbalance between the two, Antoinette pressures and coerces S into situations she does not want to be in. Antoinette constantly gives S the false hope that they will be more than just a sexual relationship, and consistently guilts her if she defies her. S is desperate for Antoinette’s love because she was manipulated into fearing and pushing away her other comrades. S feels she has no one to trust, and her unresolved traumas manifest into anger that scares the other crusaders. Thus, Antoinette has effectively trapped S in this abusive relationship, and due to being a monarch, has the power to demote or punish her if she doesn’t follow her wishes.

To make matters worse, she leads on Green and eventually cheats on S with her, pitting the two against each other to fight for her affection.

Despite being a cold and terrifying leader, it is her lust for riches, disorganization, and cruelty that leads to all of the surviving generals to give up their loyalty. As a result, no one mourns her once she is beheaded by Aiko.