Delta is a character who appears in Isekai Quartet 3 as a member of the Shadow Garden organization. She is fifteen years old. Delta joined Shadow Garden as the fourth member after her master released her from a state of demonic possession. Her personality is defined by a lack of self-control and a tendency toward rash behavior, which makes her the most dangerous and brutal individual within the group. Her notable abilities include incredible physical strength that complements her aggressive and unrestrained fighting style. Within the story, her role is tied to her membership in Shadow Garden, though specific plot actions are limited to the crossover setting of the series. Her key relationship is with the master who saved her from demonic possession. Information about her personal motivations, detailed character development across the series, or specific interactions with other characters beyond these basic traits is not available in the provided search results.