Ban Ashina is a character from the anime Dead Account, identified as a male teenager with a distinctive appearance. He has blue eyes and blue hair that reaches chest length, and his design includes muscular features, gradient hair, a hair streak, and boots.

Ashina is a student initially belonging to class 1-A before his transformation into a dead account, a ghost-like state within the series' context. This transformation is orchestrated by the antagonist known as K or Lonely K, who turns Ashina into a dead account as part of a larger move against the opposing class. Crucially, this fate is not forced upon him against his will. Ashina willingly accepts becoming a dead account and agrees to serve Lonely K, a decision that other characters interpret as stemming from a deeply narcissistic and foolish personality. This willingness to embrace death and become a tool for the villain defines his core motivation and sets his role in the story.

As a dead account, Ashina becomes a primary antagonist. He is confronted by the hero, Soji Enishiro, who must fight and perform an exorcism to stop him. The battle between Soji and the transformed Ashina is depicted as an epic and dynamic confrontation. During this fight, Ashina demonstrates notable abilities, including the power to create a massive storm that traps the students from classes 1-A and 1-B inside a rescue center, forcing them to observe the battle from a distance. His specific combat style is referred to as a freezer-type, indicating an ability related to freezing or immobilization. The character's psychological state as a dead account plays a significant role in the narrative, with the fight's conclusion leading to revelations about the main villain, K, and leaving a strong impression due to Ashina's particular psyche. Through his willing sacrifice and transformation, Ban Ashina serves as a significant obstacle for the protagonist, highlighting the manipulative power of the main antagonist and the tragic, self-destructive choices characters can make.