Shalba Beelzebub

"A curse! This is a curse! I shall become the poison who will devour the Underworld.....! Those Devils who declined me! I have no business with such an Underworld! I don’t care about them anymore! I don’t care about the authority and possession of the Underworld anymore! Fuhahahaha! This Shalba Beelzebub shall use his last bit of power to destroy the Underworld together with the monsters!"

- Shalba Beelzebub exclaiming his desire to destroy the Underworld in Volume 11, Life 4

Shalba Beelzebub was one of the three leaders of the Old Satan Faction before his death in Volume 11. He was a descendant of the original Beelzebub. He was also one of the main antagonists in Volume 6 of the light novels.

Appearance
Shalba had the appearance of a handsome man dressed in black armor with a cape. He had long brown hair that goes to his hips with many bangs covering his right eye.

Personality
Shalba was cruel, ruthless, and manipulative. He manipulated Diodora Astaroth into working for the Old Satan Faction and killed him when Diodora outlived his usefulness. Like Creuserey Asmodeus and Katerea Leviathan, Shalba believed that he was the true ruler of the Underworld, calling himself a "True" Satan.

Shalba had immense arrogance, strongly believing that his heritage as Beelzebub's descendant made him superior to everything. Even Issei noted that Shalba only cared about special bloodlines and world domination. Due to his arrogance, Shalba also desired to to conquer and rule the World like Katerea and Creuserey, as he furiously cursed Vali and Issei for constantly thwart his ambition.

After his defeat by Issei in Juggernaut Drive, Shalba became mentally deranged due to his excessive pride and arrogance, planning to destroy all Devils and the entire Underworld for denying him.

History
He and the other descendants of the original Satans (except Vali) believed that the current Devil system was mistaken and sought to change it by killing the current Satans and taking control of the Underworld.

Birth of the Breast Dragon Emperor
Shalba first appeared in Volume 6, revealing that he had sent Asia to the Dimensional Gap then killed Diodora Astaroth who begged him to kill Issei. He then told the Gremory Team that Asia is dead. This action however, turns out to be his undoing as he unintentionally made Issei activate his Juggernaut Drive which causes Issei to go on a berserk rampage, biting off his left hand and overwhelming Shalba who was beaten to near death because of it. He is seemingly killed after being hit by Issei's Longinus Smasher.

The Heroic Oppai Dragon
Shalba reappeared in Volume 11, revealing to have survived Issei's attack and kidnaps Leonardo, forcefully activating the boy's Balance Breaker which created 13 gigantic monsters, which he used to attack the Underworld in an attempt to destroy all the Devils that rejected him. He then kidnapped Ophis and escaped into the crumbling dimension with Issei chasing them. He eventually fought against Issei, but was defeated and killed by him, but manages to use an arrow infused with Samael's blood (given to him by Hades), which caused Issei's apparent death.

Powers & Abilities
Immense Demonic Power: As the descendant of the original Beelzebub, Shalba had an impressive amount of demonic energy. When using Ophis' snake, his demonic energy was equivalent to the previous Beelzebub.
 * Bee Manipulation: During his second fight with Issei, he revealed the ability to control bees.

Flight: Being a Devil, Shalba was able to fly using his wings.

Equipment
Light-Manipulation Device: In his first appearance, He wielded a device that allowed him to control light, similar to the abilities of an Angel or Fallen Angel.

Trivia

 * Shalba was the only descendant of the original Satans, aside from Vali, to appear more than once.
 * Shalba is currently the only named character that has been killed by Issei.
 * Shalba's name is derived from two male characters from the Gundam TV series; Shagia and Olba Frost.
 * His ability to manipulate bees is a nod to the demon Beelzebub's title as "Lord of the Flies" and his ability to control all families of flies.