|Manga||Volume #4, Boruto Chapter #15|
Delta (デルタ, Deruta) is an "Inner" from the organisation Kara.
Delta has a short temper, which makes her destructive at times, such as kicking a table that her leader was eating at to vent her frustrations. She is very focused on missions, getting visibly irritated when they are not completed within the expected timeframe. Jigen mentioned that she has been worried about her weight previously, which indicates that she cares about her appearance.
Delta has long, curly hair and unusual eyes, with vertical lines running along the irides. She has a tattoo of the Roman numeral Ⅰ in the centre of her forehead. She wears a dark cloak and a dark coloured outfit with bishop sleeves, striped tights, and long high-heeled shinobi sandals.
Delta has proven to possess a great amount of strength, being able to launch and break a table against the far-side of a wall without visible effort from a sitting position.
Main article: Ao Arc Delta attended a meeting held by Jigen to discuss the urgent situation relating to the missing "vessel". As Jigen dispelled the genjutsu, he voiced that they must recover the vessel at all costs.
Main article: Kawaki Arc During dinner with Jigen, Delta was concerned about Koji Kashin trying to retrieve Kawaki. After listening to Jigen's reasoning, she angrily kicked away the table and demanded to know the leader's explanation for how long the vessel's recovery was taking. Delta later received permission from Jigen to check on the mission's progress herself, and report back to him if there are any issues.
She joined Koji from afar and was asked by him if she brought an Outer which she confirmed that she brought Garō to retrieve Kawaki. She watched as the defiant Kawaki attacked Garō. Delta was also surprised to find out Boruto Uzumaki has a possession of Kāma. After Kawaki killed Garō and fainted from overheating, Delta felt it would be a good time to get rid of the Konoha-nin and retrieve Kawaki. Koji argued that Boruto having a Kāma warranted further observation before taking action, and that with the blimp crash, it was inevitable that the world would learn of Kara's existence. Later, she and Koji arrived at the main gates of Konohagakure to retrieve Kawaki. Delta stated that it would be difficult infiltrating. Despite her statement, she was told to stay put by Koji, who entered the village without setting anything off.
- "Delta" is the fourth letter of the Greek alphabet.