Voice Actress: Eden Riegel (https://youtu.be/GEiacg5jo48)

The main heroine of XBlaze: Code Embryo and the true protagonist of XBlaze: Lost Memories. She is also the true identity of Nobody, one of the main characters of the game. She makes her first playable appearance in BlazBlue: Central Fiction, introduced in the console version as DLC. Es's Drive, Crests Arts, turns the trail of her sword attacks into a trail of damage dealing Crests. She is the gate keeper of the Azure, and her duty sees her memories repressed and her returned to the emotionless state she first appeared in within her own series. Despite this, her memories will occasionally resurface, and she retains her deep love of pudding. Es is implied to have a history with Amane given their interactions. She is later revealed to be a false gatekeeper designed to draw attention away from Ragna, the true gatekeeper. After the end of the story, Es remains guarding the gate to the Azure. There are some hints that the Es seen guarding the gate in BlazBlue may simply be a recreation of the real Es, but nothing is outright stated.

Emotionless, steady, and objective focused. Es is the perfect soldier, her mission always comes first. When she first met Tōya Kagari, she did not care for him or any other person, being willing to hurt and even kill others that she was “friends” with just so she could complete a mission. If Es did not understand a term, mainly because of the informality or colloquial speech, then she would forwardly ask what said term means, leading to unique, and awkward situations. For a time, she possessed no opinions due to her little interaction with people outside of the Agency, as well as this, Es possessed a habit of taking things too literally, annoying Tōya as he put up with her awkward social tendencies.

Possibly because of her initial lack of understanding towards humans, Es was prone to revealing information to others unnecessarily, and would often act in a robotic manner towards anyone conversing with her. She would also ignore the orders of anyone who was not her superior or essential to her mission objectives, leading to humorous circumstances; it was because of this tendency that she was seen as unerringly stubborn.

In BlazBlue: Central Fiction, Es appears to have regressed to how she was in Code: Embryo, appearing emotionless and doing whatever it takes to complete her mission given by the Blue. Despite this, she does recall liking pudding according to her memories and has nostalgic memories about the people precious and dear to her, hinting that her emotions and true self might be restrained.