Gretel is a character from the visual novel OZMAFIA!!, and her depiction relies on source material that is not widely detailed in English databases. She is a student at Grimm Academy, which places her within the academic environment that exists alongside the city's mafia conflicts. Physically, Gretel is described as a teenage girl with blue eyes and long blue hair that reaches her waist. She is frequently seen wearing a hat and has a small pet, though further specifics about the animal are not provided. Her most defining characteristic is her twin brother, Hansel, with whom she shares a close sibling bond.

Regarding her personality, Gretel is consistently depicted as being deeply pessimistic. Her worldview is notably gloomy and extreme, as she suffers from severe paranoid delusions and persecutory thoughts, always anticipating negative outcomes. This creates a sharp contrast with the more assertive personalities of the main Oz family characters. No information is available regarding her specific role in the overarching story, her personal motivations for her actions, her relationships with characters other than her brother, any developmental arc she might undergo throughout the narrative, or any notable abilities she may possess.