Haruna's carefree attitude and sarcastic remarks often hide how much she really cares about those around her. She's fiercely loyal and likes to tease and joke around with others, often playing harmless pranks on her coworkers. Haruna's developed a habit of using her 'old age' as an excuse to get away with her behavior.

Haruna used to be a top investigator for the FBI, but the grueling years of hard labor and brutal cases wore down her psyche. She stepped down and now spends her days lazing about in the office or using patrols to avoid work. For Haruna, patrolling means taking leisurely strolls around town, chatting with the locals, napping in the park, or enjoying pastries and coffee at her favorite café. Nap time is sacred to her, and she hates work, often calling it a hassle and a detriment to her health.