A former trusted right-hand man of the Sonozaki family head, Mifune became infamous for betraying the family after the head’s passing. Ambitious and ruthless, he attempted to seize control of the organization by orchestrating Akane Sonozaki’s murder and leading a violent assault against the heirs.
Mifune was the closest aide to Sonozaki Mion’s father, the original boss of the Sonozaki Group.
After the leader died due to illness, Mifune plotted to overthrow the family by eliminating Akane Sonozaki, who served as interim head.
He organized a raid on Hinamizawa village, targeting Mion and her allies, but his reign ended when Mion (actually Shion Sonozaki in disguise) killed him with a sword.
In the "Higurashi Rei" universe, Mifune straightforwardly becomes the second-generation boss of the Sonozaki Group, though he remains in fierce opposition to the Sonozaki main family.
When challenged for succession, he requested Mion and Shion prove themselves through a contest, where he suffered a humiliating defeat.
As a penalty, Mifune was forced to parade through town wearing the Angel Mort restaurant uniform, drawing public ridicule.
Despite winning the succession by default—since Sonozaki sisters had no interest in leading—Mifune’s pride was shattered, driving him to sever ties with the main family.
His antagonism with the Sonozaki family deepened following successive defeats, especially against Mion.
Later, Maebara Keiichi exposed Mifune’s secret fondness for cross-dressing, but surprisingly accepted him for it.
Mifune grew attached to Keiichi, emulating Yukikazu Kameda and calling Keiichi simply "K", reflecting his intense admiration.
Driven and calculating, Mifune’s ambition pushed him to betrayal and violence.
Despite his authoritative demeanor, his ego was easily wounded by personal loss and public humiliation.
His softer side was revealed through his hidden desires, showing an unexpectedly vulnerable and even quirky nature.
Ultimately, he’s a character marked by contradictions—tough yet insecure, dominant yet susceptible to defeat and humiliation.
Mifune’s actions leave a lasting impact on the Sonozaki family’s internal struggle, representing the dangers of unchecked ambition.
His dramatic downfall adds intrigue and humor to the series, making him a memorable antagonist with surprising layers beneath his intimidating surface.
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