TV-Series
Description
Fossette, also known by the name Ekubo, is a recurring spirit and an uneasy ally to the protagonist in Mob Psycho 100 II. His background is that of a cunning and opportunistic ghost who initially sought to use Mob for his own gain but gradually becomes more entangled in the boy's life and struggles. Throughout the second season, Fossette acts as a pragmatic and often cynical counterbalance to Mob’s earnest naivete, frequently offering advice that prioritizes self-preservation over idealism, though his own motivations are not always purely selfish.

In terms of personality, Fossette is shrewd, manipulative, and possesses a sardonic sense of humor. He often presents himself as self-serving, but his actions reveal a growing, if grudging, loyalty to Mob and their group. Despite his tendency to mock human weaknesses, he demonstrates a keen understanding of emotions and social dynamics. His primary motivation shifts from exploiting Mob’s power to a genuine concern for the boy's well-being, largely because he recognizes that Mob’s emotional stability is crucial to preventing catastrophic outcomes. When Mob’s house is burned down and the boy’s emotional state reaches a breaking point, it is Fossette who intervenes. He quickly devises a plausible lie about who was responsible, not necessarily because it is true, but because hearing a rational explanation, even a fabricated one, is enough to calm Mob down and prevent his explosive rage from manifesting. This act shows that Fossette values preventing destruction over cold honesty, highlighting his role as a pragmatic protector.

Within the story of Mob Psycho 100 II, Fossette plays a critical supporting role. He acts as a strategist and a guardian, particularly when Mob is incapacitated or emotionally compromised. During the final confrontation with Claw, when Mob remains asleep after regaining consciousness, Fossette is tasked alongside Arataka Reigen with the difficult job of protecting the vulnerable boy. This places him in a position of frontline defense, using his spiritual abilities to shield Mob from physical and psychic threats. His relationship with Reigen is particularly notable; the two share a dynamic of mutual disdain and begrudging respect, often bickering but ultimately cooperating effectively when Mob is in danger. His key relationship, however, is with Mob himself. Fossette acts as a dark mirror and an occasional mentor, expressing astonishment at Mob’s rapid emotional growth and self-control. He is frequently shown to be almost unable to reconcile the timid, insecure middle schooler he first met with the strong, decisive individual Mob is becoming.

Fossette’s development across the season is subtle but significant. He moves from being a spirit with a concrete, ambitious agenda to one who is more integrated into the group, investing in the safety of his companions beyond mere self-interest. His notable abilities include flight, intangibility, possession, and various psychic attacks typical of a powerful spirit. He is also a skilled strategist and an expert in psychological manipulation, which he uses as often to diffuse situations as to create them. His quick thinking and ability to improvise plans under pressure prove essential on multiple occasions, solidifying his position not just as a tag-along annoyance, but as a vital member of the team.