Miwa is a young woman who works as a part-time assistant at the private detective firm run by her older brother. She has very long blonde hair and orange eyes. Her personality is gentle, patient, and understanding, which makes her a calm presence in the otherwise eccentric and chaotic environment of the agency. She is always willing to help others and takes her duties seriously, often acting as a grounding force for the more impulsive members of the group. Her motivation centers on supporting her brother and his coworkers in their various investigations, however absurd they may be. While she does not possess any special abilities, her reliability and kindness make her a valuable member of the team. Her role in the story is primarily that of a supportive assistant who provides a contrast to the over-the-top humor of the series. She does not undergo significant personal development but remains a steady, likable figure throughout the narrative.