Jel embodies the unpredictable force of chaotic energy disrupting the protagonist's high school trajectory as a primary character. He spontaneously founds the "Youth Romance Club" upon Tooi's arrival, immediately recruiting her. This club operates under an unconventional mandate to pursue anything perceived as embodying "youthful" or "romantic" experiences.

His personality radiates extreme enthusiasm and chaotic energy, directly opposing the protagonist's desire for normalcy. Jel consistently launches bizarre schemes, propelling others into comedic situations as they participate in his spontaneous quests for perceived youthful adventures. His behavior acts as the catalyst for the narrative's escalating absurdity.

Within the club, Jel functions as the primary instigator of chaotic antics. His actions trigger increasingly unpredictable scenarios, including the unplanned streaming of their activities online, amplifying the public visibility of their misadventures. His relentless drive to manufacture "romantic" or "youthful" moments fuels the core conflict, generating continuous comedic friction through others' reactions and damage control.

A notable narrative device features Jel appearing in live-action sequences within the animated film, further emphasizing his role as an unpredictable force.

Concrete details about Jel's history, family, or life beyond school activities are not provided. His character development manifests primarily through escalating club activities rather than internal growth or personal revelations. The narrative focuses on his function as an agent of chaos within the school setting, without exploring his origins or motivations beyond his stated desire to pursue "youth" and "romance."

Information regarding Jel's portrayal in other seasons, movies, OVAs, or spin-offs does not exist, as available materials solely reference the single film. His character arc concludes with the film's ending without significant alteration to his core traits or circumstances.