Arnes

Arnes (アーネス, Ānesu) was a greater devil who served and worshiped Wolbach, the Goddess of Sloth and Violence. She was killed by Megumin's explosion magic after she attempted multiple times to kidnap Chomusuke, the violent aspect of Wolbach.

Appearance
Arnes had the appearance of a beautiful and voluptuous woman on her twenties, with cat-like yellow eyes and free-flowing waist-length red hair with an ahoge. She had pointed ears similar to an elf and a strange love heart-shaped mark on her chest.

She also had some demonic features such as goat-like horns sprouting from the sides of her head and bat-like wings protruding from her back which she could use to fly.

Anes usually wore a very revealing attire similar to the Succubi, consisting of a gold choker, knee-high boots, underwear, a bikini top and sleeved gloves. When traveling incognito Arnes would wear a short cloak with an animal ears hood to cover her more inhumane features.

Personality
Arnes was a genuinely loyal and caring subordinate towards Wolbach, and was devastated when Chomusuke failed to recognize her. While she was considered to be cunning, she was still outwitted by Megumin several times. Despite her power, she was repeatedly ambushed and forced to retreat.

Abilities
Arnes was a greater devil, an extremely powerful immortal creature from Hell which fed off of negative emotions to survive. According to Megumin it would've taken the combined effort of several Arch Wizards using advanced magic to defeat her. She was able to defeat around twenty adventurers simultaneously with her bare fists.

As a greater demon, Arnes could manipulate a creature's negative emotions, such as making various monsters more aggressive than usual. However because she was a devil, she was weak to holy magic used by priests.

Intermediate Magic: Arnes herself was a powerful mage who could use various intermediate-level spells. She had a large amount of mana, as she was able to conjure an extremely powerful Fireball that would've been capable of killing dozens of people despite being an intermediate spell.
 * Fireball: Fireball is an intermediate spell, which, when cast, generates a ball of flame that can be thrown at a target.
 * Lightning:Lightning is an intermediate spell which generates a bolt of lightning from the sky that arcs towards its target.