Sairaorg Bael

Sairaorg Bael is the next heir of the Bael Clan and the cousin of Rias Gremory and Sirzechs Lucifer. He is known as the strongest young Devil. His peerage consists of Devils that are scorned by other Devils.

Appearance
Sairaorg is a handsome young man with black hair and violet eyes. He is very tall and has a muscular body due to the extreme training he has done.

Personality
Sairaorg has a noble and calm personality and greatly respects his opponents. He also likes to fight strong people, to the point that Rias Gremory, his own cousin, called him a battle maniac. He is shown to be a kind-hearted and compassionate person and has a very straightforward personality.

History
Born as the eldest son of the Bael Clan, Sairaorg failed to inherit the Bael's trademark Power of Destruction that Rias and her brother inherited from their mother, who came from the Bael Clan. Because of this, his younger half-brother was appointed to become the next heir of the Bael Clan. Sairaorg and his mother, Misla Bael, were then shunned by the Bael Clan, being sent to the countryside of the Bael territory. During his time there, Sairaorg was constantly bullied by other Low and Middle-Class Devils, until Misla advices him to become strong in different ways. Sairaorg then started training his body to its limits to become powerful and due to this, he defeated his younger half-brother, which made him the next heir of the Bael Clan. After his defeat, the younger half-brother now plans on assassinating Sairaorg but fails. Sairaorg desires to become Satan to prove his worth even with his lack of special demonic powers.

Sometime before the series, Sairaorg found Regulus, the Lion King, sealed in the Longinus, Regulus Nemea, after its possessor died and it materialized itself. Sairaorg then tamed Regulus and made it his servant through 7 Pawn Evil Pieces.

Birth of the Breast Dragon Emperor
Sairoarg appears in Volume 5 as one of the six young Devils chosen for the Young Devils Gathering and stopped Seekvaira Agares and Zephyrdor Glasya-Labolas who were arguing, knocking Zephyrdor out and convincing Seekvaira to stand down. He later faces Zephyrdor in a Rating Game which he and his team overpowered Zephydor's team and won by dominating and crushing Zephydor's will to fight.

He reappears in Volume 6 alongside his Queen, Kuisha Abaddon, after finishing his interview on the television at the Underworld for the Young Devils Gathering, greeting Rias and her peerage who were on their way for the same interview and leaving after telling Rias that he wants to fight them with pure power only.

The Heroic Oppai Dragon
In Volume 9, he has a sparring match with Issei while his hands and legs are on a heavy seal. Near the end of Volume 9, he is seen talking with Seekvaira who was complaining about Issei's new powers and that the current Satans favor him but Sairaorg, who was pleased by the event, ignored her.

In Volume 10, Sairaorg faces Rias in their Rating Game, during which he eliminated Yuuto Kiba, Xenovia, and Rossweisse in the games, facing Issei in the final round. While initially refusing to use the Balance Breaker of his Longinus, Regulus Nemea, he eventually used it after persuasion from Issei. In his Balance Breaker form, Sairaorg's strength and speed increased greatly to the point where he easily shattered Issei's Scale Mail in Rook mode. Despite this, he ultimately lost to Issei after the latter manages to achieved his Cardinal Crimson Promotion in their battle, fighting Sairaorg in a fist fight which Sairaorg lost after losing conscious.

In Volume 12, Sairaorg goes to the Gremory territory to check on Rias and is the one responsible for helping her regain her composure after Issei "death". He later fought against Heracles and easily defeated him. He and the Gremory Team then welcome Issei who came back from the Dimensional Gap, witnessing Vali Lucifer and Pluto's fight, which Vali won dominantly as Issei and Cao Cao fight one-on-one in a rematch. After Issei defeats Cao Cao, Sairaorg proclaims that he shall be the one to defeat Issei.

The Legend of Oppai Dragon and his Lively Companions
In Volume 16, Sairaorg participated in the meeting for the formation of D×D and agreed to join the team to fight against Rizevim Livan Lucifer and Qlippoth.

Powers & Abilities
Master Hand-to-Hand Combatant: Sairaorg is a master hand-to-hand combatant, having practising martial arts for a long time.

Immense Durability: Sairaorg's greatest feature, his durability that greatly surpasses that of common sense. Due to him not inheriting the Bael's Power of Destruction, Sairaorg has trained his body to the extreme, gaining a body with great durability. He was able to take on Rossweisse's Norse Magic, Durandal's Holy wave and Heracles's Balance Breaker head on with minor injuries only.

Enhanced Speed: Due to his extreme training, Sairaorg has attained God-like speed that is equivalent if not faster than that of Yuuto Kiba.

Immense Power: Sairaorg's power is his greatest weapon. Sairaorg has shown time and time again that he could break even the hardest defence simply using the pure power of his fist. During his fight with Yuuto Kiba, Xenovia and Rossweisse, Sairaorg's power, used with Touki, increased to the point that he was able to create a massive earthquake that devastated the entire field of the Rating Game. In fact, during his fight against Heracles, he was able to destroy a building simply with the aftershock from punching Heracles.

Touki (闘気): The years of intense training done by Sairaorg allowed him to gain control of his base of life through his intensive training, granting him an enormous amount of Touki to further strengthen his power. When Sairaorg uses his Touki, his speed, power and defense increase drastically. In fact, his life force is so powerful that even after his right hand was cut down by the Durandal, it remained instead of vanishing like it would have for an ordinary Devil.

Lion Tamer: While Sairaorg has not shown it, he has mentioned that he has the ability to tame Regulus, hinting that he inherited the ability from the Vapula clan in which his mother, Misla Bael, came from.

Equipment
Regulus Nemea (獅子王の戦斧（レグルス・ネメア）, Regurusu Nemea): One of the 13 Longinus, Regulus Nemea takes the form of a great battle axe that resides the spirit of a Nemean Lion named Regulus, although the spirit is able to materialized itself taking the form of a huge Lion. While Sairaorg is not the official wielder of the Regulus Nemea, Sairaorg can combined with Regulus to use its Balance Breaker.
 * Regulus Rey Leather Rex (獅子王の剛皮（レグルス・レイ・レザー・レックス）, Regurusu Rei Rezā Rekkusu): The Balance Breaker of Sairaorg Bael, it is a sub-species that creates a Golden Lion Armor and allows him to use the lions powers through his fists to further augment his power. When Sairaorg used it in Volume 10 along with his Touki, his strength increased so much that he was able to fight on par with Issei Hyoudou and his Cardinal Crimson Promotion during the final match of the Rating Game.

Quotes

 * "—I just believe in my own body, that's all." (Volume 9, Life 1)

Trivia

 * Sairaorg is the only pure-blooded Devil to own a Longinus Sacred Gear.
 * Sairaorg's peerage consists mainly of Devils that are scorned by other Devils, therefore they are thankful to Sairaorg for accepting them and as a result, are very loyal to him and support his dreams of becoming a Satan to the fullest.
 * Sairaorg made a brief cameo appearance in Season 1, Episode 12 of the anime and Chapter 21 of the manga as one of the guests attending Riser Phenex's engagement party.
 * Sairaorg is known as one of the "Rookies Four" along with Rias, Sona, and Seekvaira.