Race: Human
Age: Unknown
Gender: Male
Abilities: Weapons; Sword
Occupation: Superhero
Level: B-Class; Rank: 61
Affiliation: Heroes Association
Debut: OPM Extra Chapter
Darkness Blade is a rookie B-Class Superhero, rank 61. He tried to stand up against the 170,000-Year Magicicada Larva but was quickly defeated and returned to Shelter Nr. 7.
Appearance: Darkness Blade is a young, tall man. He has fairly long, unkept hair and a large, X-shaped scar on his right cheek. He had narrow eyes with dark circles under them. Darkness Blade dressed in a black, decorated armor with many spikes and scales. Around his waist, he carried a black buckle with the scabbard of his sword attached.
Personality: Darkness Blade has an intimidating aura and is confident of his own power. He speaks in a very sophisticated way, almost poetic and very heroic, but as commented on by Red Muffler, sounds pretty stupid.
(Source: One Punch-Man Wikia)