Doom

Doom is the eldest son of Innocent Zero. He is also the strongest member of the Devil's Quintuplets.

Due to his actions and role, he is a major antagonist in the Eclipse Arc.

Appearance
Doom is a very tall man with unkept light-colored hair. He also wears a visor that covers his upper face. Underneath his visor are eyes lacking pupils.

Personality
Doom is in constant search for a worthy opponent and greatly enjoys his battles. He, however, claims to not enjoy picking on the weak. Doom also shows himself to be a coolheaded and calm man compared to his brothers' with their personalities and eccentricities. According to Cell War, Doom is wary towards his younger brother, Famin due to his insanity and extreme violent impulses, however, Doom still maintains his calmness as he regularly bashes off Famin's threats and keeps him in line with equal amount of violence.

Equipment
Caladbolg (カラドボルグ, Karadoborugu): An incredibly large sword wielded by Doom. It has a crude blade and an unusual handle. It's named after the sword of Fergus mac Róich from the real-world irish mythology.

Master Cane: According to Domina, Doom was chosen by one of the thirteen Master Canes. Doom's Master Cane enables him to use his magic power to enhance his physical capabilities, effectively allowing Doom to surpass his human limits.

Magic and Abilities
Unknown Magic: The name and nature of Doom's personal magic is unknown. It seems, that he rarely uses it, as his Master Cane's power and his own natural strength normally suffice to take down his opponents. Mash managed to force Doom to use the latter's magic during their battle.

Immense Magic Power: As the eldest of the Devil's Quintuplets, Doom is stated to possess an incredible amount of magic power. While not possessing a higher amount of magic power than Domina, Doom is still said to be stronger overall speaking. Doom's magic power increased after his first encounter with Mash, as noted by Cell War.

Swordsmanship: Doom is a powerful swordsman. His swordsmanship, combined with his strength and speed allows him to defeat opponents without using his personal magic and he is able to create powerful air slashes to cut through his targets from distance. He was even able to destroy Renatus Revol's Thirds with his skill and strength alone.

Immense Strength and Speed: Doom possesses incredible strength and speed, even with just a small portion of his power. He is able to wield his massive sword with ease and even perform swift attacks with it. His strength and speed at 50% is great enough to match Mash's (albeit with his wrist weights on). Similar to Mash, Doom is capable of great muscle control, as shown when he prevented Famin from cutting him with a card by clenching his muscles.

Immortality: Doom and his brothers got their hearts replaced by demonic ones, that can use magical energy to heal bodily injuries. They cannot be killed by conventional means, as they can regenerate at an extreme speed, as long as they have enough magic power, which will not run out due to a dose of Innocent Zero's powerful blood in their veins.

Relationships

 * Innocent Zero: Doom's Father, he respects his father to the point he stopped himself from finishing off Mashle when told to withdraw.
 * Famin: Younger Brother, second son of Innocent Zero and second after Doom himself.
 * Epidem: Younger Brother, third son of Innocent Zero.
 * Delisaster: Younger Brother, fourth son of Innocent Zero.
 * Domina Blowelive: Younger Brother, fifth son of Innocent Zero.
 * Mash Burnedead: Younger Brother, sixth son of Innocent Zero and the youngest of his children.

Battles

 * Doom vs Mash Burnedead
 * Doom vs Renatus Revol

Trivia

 * Doom's calmness and incredible confidence greatly resemble that of Mash.