Unnamed Lightning Demon

Lightning Demon was an unnamed Demon-level threat. It was killed by Mumen Rider

Appearance
This monster was huge and muscular with horns coming out of its head and back that looked like to be bolts of lightning. It had two eyes and no mouth.

Neo Heroes Uprising Arc
Stinger, Blue Fire and a small group of Neo Heroes are seen defeated on the ground, saying that the monster is too powerful for them to handle. People are terrified as it was able to defeat A Class Heroes, while the monster is heading towards a mother and her children. Satoru shows up to confront the monster. It looks to be defeating him with ease, using his powerful arms and shooting lighting at him. It's revealed Satoru has a battle suit, and though his determination, he is finally able to overpower the monster and kill it with Justice Uppercut.

Abilities and Powers
As a Demon-level threat, Lightning Demon was a powerful monster, being able to defeat A-Class heroes and Neo heroes with apparent ease. It also had the ability to manipulate lightning.

Physical Abilities
Enhanced Strength: Lightning Demon appeared to have great physical strength, showing to defeat A-Class heroes with no effort. It was also able to punch through solid concrete with ease.

Supernatural Abilities
Electricity Manipulation: As an electricity-based monster, Lightning Demon had shown to change the weather, making the clouds go dark and lightning. It had also been seen to shoot lightning at his opponent.

Trivia

 * This is the first Demon Level threat Mumen Rider has defeated.
 * The fight between this monster and Mumen Rider is a reference to when he battled the Deep Sea King back in Chapter 26, this could be the same power in strength as The Deep Sea King. Showing growth in Mumen Rider over time.