Fish of Darkness

Fish of Darkness was a Mysterious Being and the head of Niya Niya Loans.

Appearance
As a human, he is light-skinned with brownish-orange, combed back hair, short facial hair, and wears a dark purple suit with a light purple, almost white shirt underneath with frilled sleeves. He also wears two white scarf ties around his neck, multiple rings, and large, red, circular sunglasses. As a Mysterious Being, he becomes a pink, anthropomorphic fish wearing black BDSM equipment.

Road to Hero
He got beaten up by Saitama for a reward.

Physical Abilities
Enhanced Speed: Fish of Darkness is fairly fast. He is a able to attack with his whip in rapid succession.

Egg Spit: Fish of Darkness demonstrated the ability to shoot out eggs from his mouth.

Equipment
Whip: Fish of Darkness uses a whip. He is fairly skilled with it as he was able to give Saitama a hard time, but it should be noted that Saitama was still fairly weak at this time.

Trivia

 * Fish of Darkness is the first mysterious being to be shown to naturally transform from a human.