Dagar serves as a ruthless lieutenant under Yuda, leader of the UD Gang, mastering the Nanto Hiyoku Ken ("South Dipper Conjoined Wing Fist"). Tasked with training assassins and managing operations during Yuda’s absences, he confronts Kenshiro and Rei by deceitfully redirecting them to Blue Town. Kenshiro triggers a pressure point that inflicts unending pain, forcing Dagar to betray Yuda’s true location. Yuda retaliates by executing him with the Nanto Kōkaku Ken, discarding him as a pawn.

In *Legends of the Dark King*, Dagar commands the "dolls," female assassins targeting rival warlords. He coerces Reina of Raoh’s army into submission through psychological torment and physical torture, including forcing her to watch Isabella’s suffering. When Reina defies him, he orders Isabella’s death but is halted by Raoh’s intervention. Yuda publicly disowns Dagar’s actions to prevent conflict with Raoh.

Video games depict Dagar as Yuda’s assist character, enabling synchronized attacks or shielding. Overreliance risks rebellion, forcing Yuda to retaliate or sacrifice him. Gameplay roles fluctuate, sometimes casting him as a boss with mechanics diverging from his manga roots.

Across all iterations, Dagar’s unwavering loyalty underscores his expendability, positioning him as a secondary antagonist whose schemes propel pivotal conflicts yet inevitably culminate in his downfall.