Miku's Father possesses a stout build, thick eyebrows, sideburns, and a mustache. Deeply caring for his daughter Miku, he exhibits a stern yet well-intentioned personality focused on her best interests. When Miku first introduced Tatsu, he reacted fearfully due to Tatsu's intimidating yakuza background. Gradually, he warms to Tatsu, acknowledging his genuine commitment to Miku and domestic life. He actively seeks to bond with Tatsu through simple father-son activities like playing catch and car camping, demonstrating growing acceptance and an effort to treat Tatsu as his own son. During their car camping trip, they cook, stargaze, and watch a late-night movie together, strengthening their relationship despite minor interruptions from outsiders.

He shares a notable trait with Miku: a chaotic and forceful approach to cooking, characterized by "knife hacking" skills and messiness, as seen in both Chapter 41 of the manga and Episode 8 of the anime, highlighting their familial connection. His initial apprehension transforms into trust and affection, driven by Tatsu's consistent househusband efforts and devotion to Miku. He remains unnamed across all media, identified solely as Miku's Father.