Ururun serves as a central character in the series, sporting a sky blue body accented by distinctive navy blue oblong shapes framing the eyes. Each eye features two eyelashes, a design detail uniquely attributed to him among the male characters of the main cast, contributing significantly to his recognizable appearance.

Personality-wise, Ururun is sensitive and easily startled, frequently reacting to surprises or unexpected situations with visible distress. This tendency often manifests as crying when caught off guard, revealing a highly responsive and emotionally expressive nature.

As one of the primary characters, Ururun is regularly involved in the series' events. He shares the distinction of being one of only two male PuniRunes within the main group, a status further emphasized by his unique eyelash trait.