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Sena (瀬名) is a royal prosecutor of Belzerg who is based out of Axel.


Sena has long, straight black hair worn with hairpins for decoration and slick sharp purple tainted pupils with a voluptuous figure. According to Kazuma, she gives the impression of a secretary, being an intelligent beauty.

She usually wears triangular glasses and her prosecutor uniform, consisting of blue skirt suit and beret with golden trimmings and borders, white shirt with 3 bottom round cuff, red tie, pantyhose and court shoes.


She takes her job very seriously and wants to make sure her investigations and trial proceedings are conducted fairly, often giving off the impression of an ice queen. Despite her good looks, she is not married, nor does she have any boyfriend (she attributes this fact to her personality), and does not take kindly to this fact being mentioned.

It is revealed in the Kyakkou spinoff that she is a fan of Boys Love, a genre of fiction that features homoerotic subtones between two men. Furthermore, this may have been a factor in her inability to marry (her last marriage meeting having fell through due to it). When confronted with a theoretical possibility (a lie made up by Dust) of the majority of men in Axel being homosexual, she becomes flustered and begins to daydream about it. She values BL to the point where she will disregard her job, jumping at the opportunity to experience it in her dreams in exchange for not revealing the Succubus' shop to her superiors.


Sena was the one who interrogated Zesta in Arcanletia when he was arrested for supposedly cooperating with demons. After coronatite inside the Destroyer exploded Alderp's mansion, Sena arrested Kazuma for suspicion of subversion of the nation. After having interrogated and discovered (via her lie detector) that he is associated with one of the Demon King Generals (Wiz), she directs a judgment, and after Kazuma was acquitted, Sena kept a eye on him until he helped to defeat another General (Vanir).

At some point, Sena became president of the "association to protect women’s chances of marriage", formed by unmarried women, investigating the possible cause for men in Axel not marrying, the Succubus Cafe. Although Dust deceived her at first, after working on the cafe for a day, Sena uncovered the true about the cafe, but agree not do anything in exchange of the succubus uses their powers to induce the men in Axel fall in love for her, but she still arrested Dust for his debts. Sena later helped Dust to arrest a group of lolicon human traffickers.


Bell: Sena uses a magical item able to see through lies, ringing when someone in the room tell a lie.