Dorimogu, also known as Mock, is a mole driven by curiosity about the surface world. He emerges from underground alongside his sister, Sweet, to investigate human activities. Together, they are motivated to intervene in surface conflicts, specifically aiding the poor, innocent, and courageous during times of need. Dorimogu actively opposes oppressive figures like tyrants, evil kings, and notorious emperors, employing clever and humorous mole-like tactics to outwit them.

He exhibits a protective and caring nature towards Sweet, functioning as a strong older sibling throughout their adventures. Their relationship involves mutual support as they face challenges, with Dorimogu often taking a leadership role in their efforts to assist others. These adventures unfold against backdrops inspired by major historical events, placing them in varied settings where they confront injustices.

Dorimogu demonstrates consistent traits of resourcefulness and compassion. His methods rely on intelligence and subterfuge rather than physical strength to resolve conflicts and achieve their goals of protecting the vulnerable. His core motivations and personality remain consistent throughout the original 49-episode television series, which contains all documented adventures and character aspects. The series concludes without elaboration on his future beyond the depicted events.