Zero Kirisame

Zero Kirisame is an alternate avatar of the protagonist Akira Ono (who primarily uses Hakuto Kunai/Demon Lord in the anime Demon Lord, Retry!). Originally created as a joke character in the game Infinity Game, Akira played him for about 10 years, making him his longtime main avatar before switching to Kunai.

In the anime, Zero appears when Kunai is forced to swap avatars to save allies (like Luna and Killer Queen) after being paralyzed by a magic ring—resulting in him losing control over Zero's actions. He has a striking, over-the-top appearance: silver/gray hair, silver eyes, gold chains, and a massive white coat featuring odd phrases and a silver dragon design on the back, which draws a lot of attention.

Personality-wise, Zero is extremely proud, arrogant, and boastful, constantly proclaiming himself the best or "the Dragon." He's a powerful close-combat fighter specializing in bare-fisted techniques, capable of unleashing immense physical strength, dragon-themed shockwaves, and attacks that scale based on an enemy's kill count. He effortlessly defeats strong foes like superior demons or large groups of enemies.

His dramatic, heroic (yet cheesy) entrances and personality leave a big impression, especially on characters like Killer Queen, who becomes obsessed with him after he saves her.