Miku's father appears as a stout man with thick eyebrows, prominent sideburns, and a mustache. His stern exterior belies a deeply caring nature, especially concerning his daughter Miku's well-being. When Miku first introduced her husband Tatsu, a former yakuza known as "the Immortal Dragon," he reacted with fear due to Tatsu's intimidating background and demeanor. Observing Tatsu's sincere dedication to domestic life and household responsibilities gradually eased his initial apprehensions.

He actively strives to build a meaningful connection with Tatsu, aspiring to treat him as a son. His efforts include initiating simple bonding activities, such as playing catch, to foster a positive father-son dynamic. This persistent drive to form a familial relationship stems from his wish to fully integrate Tatsu into the family and support Miku's marriage. His relationship with Miku features mutual care and shared traits; Miku specifically inherited his distinctive "hacking" knife skills and similarly chaotic approach to cooking, demonstrated during collaborative meal preparations like hotpot in Chapter 41 and Episode 8.

His background story remains unexplored across adaptations, though his role is consistent in official media. The live-action drama introduces the original character Himawari (Miku's daughter) without expanding on his involvement or development. Similarly, the anime and ONA adaptations provide no additional backstory or character evolution beyond the source material. No significant changes or expanded narratives involving him occur in documented spin-offs or films.