Dororon is a mud sprite who lives in Shizuku Forest, known throughout the woods for his mischievous streak. He delights in playing pranks, particularly by flinging mud at others. Though his actions cause trouble, his friends, including Shizuku-chan, cherish him because his pranks spring from a playful desire for fun, not malice.

His background includes family connections, hinted at by an episode titled "Dororon's Wife?!". A special episode focused on learning Hiragana also features Dororon celebrating his birthday, showcasing his participation in community events.

In the human reimagining "NiJiRo Fairy Shizuku-chan", Dororon adapts as a mud sprite within this new narrative setting alongside the rest of the cast. Unofficial fan-created content consistently echoes his established role as the group's prankster, depicting him initiating playful trouble while remaining an accepted member.