Uzuki

Uzuki, operating under the alias Slur, is the central antagonist of Sakamoto Days' current final battle arc, engaged in a decisive confrontation that has directly caused serious injury to protagonist Taro Sakamoto and drawn his ally Nagumo into direct combat as well.

Role in the climax arc

Uzuki's fight in this arc is depicted as significant enough to single-handedly devastate an entire assassin organization referred to as "the Order," underscoring just how dangerous a threat this final antagonist represents compared to earlier obstacles in the series. That scale of destruction is part of why this arc reads as the story's genuine endgame rather than another self-contained mission.

Connection to Nagumo

Uzuki's motivations are tied to the same event driving Nagumo's involvement in the fight: the death of a character named Rion. That shared, grief-rooted backstory positions Uzuki less as a purely villainous obstacle and more as a mirror to Nagumo — two people responding to the same loss in ways that put them on opposite sides of the same fight.

Why this confrontation matters

As the manga's story has been described as heading toward its climax, Uzuki's role as the arc's primary threat is central to how high the stakes have been raised — this is a fight the story frames as costing its cast real, lasting damage rather than resolving cleanly, consistent with how a series' true final arc typically escalates past what earlier confrontations were willing to risk.