OVA
Description
Hazuki Yazakura is the adopted elder sister of the protagonist, Chitose Hitotose, and shares this sibling bond with him and the younger sister, Minazuki Rokumatsuri, despite the absence of blood ties. Her background includes time spent in the same facility as Chitose and Minazuki before eventually leaving to establish her own life. This history firmly anchors her role as a supportive, if often absent, member of the main family unit.

In terms of appearance, Hazuki is depicted as a tall young woman with a glamorous figure, long straight hair which she often wears in a ponytail with a ribbon, and purple eyes. Her birthday is on August 8th.

Hazuki possesses a cheerful personality that tends not to dwell on trivial matters. She exhibits a deep affection for Chitose and Minazuki, treating them as if they were her own younger siblings, and holds great trust in the five maternal teachers who care for Chitose. Her primary motivation revolves around her career as a celebrated pop idol, which dominates Japan's music scene and keeps her on a demanding tour schedule across the country. Despite her constant travels, she remains an integral part of the household's daily life during her brief returns home, weaving herself into its rhythms and competing for Chitose's attention in lighthearted rivalries with the other mothers.

One of Hazuki's most notable and defining abilities is her extraordinary capacity for food consumption. She is a master of a unique fictional discipline known as Okadu, or the "Great Eating Path," which is a martial art centered on the rapid consumption of food. This discipline has an inverted ranking system where level ten is the entry point and progressing to level one signifies near-impossible mastery. Hazuki has achieved the pinnacle of this art, holding the title of "Obakyu" as a level two master and sub-instructor. Her skills in this area earned her the nickname "Overweight" and she frequently engages in eating contests, often clashing with the character Satsuki Gokajo to showcase her unmatched gastronomic speed.

Her role in the story is that of a sporadic yet charismatic presence whose fame and appetite create unique situations for Chitose and his unconventional family. In one notable episode, after misunderstanding a comment from Minazuki, she initiates a series of competitions against all five mother figures, with Chitose as the prize. Her narrative arc sees her achieving her career goals early on, becoming not just a rock singer but a world-famous and legendary performer. Her bond with Chitose remains firmly platonic and is anchored in their shared adoptive history and mutual respect, with her character consistently framed through the three core pillars of her idol prominence, Okadu expertise, and role as an intermittently present but affectionate sibling.