|Occupation|| Alderman (formerly)|
Cult member (in secret)
|Family|| Maya Resik (mother; deceased)|
Sebastian Sangre (father; deceased)
Sebastian Blood, also known as Brother Blood, was the mayor of Starling City, former alderman, and undercover cult leader who rose to power following The Undertaking and one of Season 2's main antagonists. He supposedly blamed the Queen family for the destruction of the east sector of the Glades. However it is revealed in "Crucible" that he heads an evil cult hell-bent on taking over Starling City. In "Three Ghosts" it is shown that Sebastian's superior is Slade Wilson, whose plan as revealed in "City of Blood" is to have Sebastian become mayor, so when Slade destroys it with his army, everyone will look to Sebastian for guidance, and he will guide them into a new age. However when Slade turned on him and decided to lay waste to the city totally, Sebastian stole the Mirakuru cure from him and gave it to Oliver, shortly before being killed by Isabel Rochev.
Sebastian Blood was a young man who was born as raised in the crime riddled neighborhood known as the Glades. His father was an abusive alcoholic and his mother was submissive to it. One day, his father came home extremely enraged and had threatened to kill them both with a gun. Sebastian got a hold of it and shot his father dead. As the police came to his home, Sebastian's mother, Maya Rezik, received the blame for her husband's death and was arrested then placed in a psychiatric institution. Upon being orphaned, Sebastian met a preacher named Cyrus Gold, who he began to view as a older brother/father-figure.
At some point in time, Sebastian met Slade Wilson who offered to make him mayor of Starling City. Seeing that the city needed to be saved, Sebastian agreed and began his mayoral campaign after the Undertaking took place.
In "Identity", Sebastian preaches outside the Starling City hospital which is getting robbed by the Chinese Triad claiming that the police do not care about the people of the Glades. Soon after Oliver Queen exits the hospital and Blood openly insults him and his family for causing their despair and tells Queen to leave them alone. Later Blood realizes that he was harsh on Queen and the two decide to have a fund raiser to help the Glades but Oliver doesn't show up. Despite the insistence of Laurel Lance, Oliver's best friend, Sebastian tells everyone that he hasn't arrived and obviously doesn't care about the Glades.
In "Crucible", Sebastian helps Oliver to set up a "guns for money" fundraiser for people affected by both the earthquake, and gun violence in The Glades, to reduce the increased gang activity (due to "The Mayor" rising to power as a gang leader), but is shot at, along with the crowd during the event by "The Mayor"s' men.
After The Mayor is arrested, a corrupt police officer takes him to Sebastian, who wears a mask and administers the unwilling Mayor with a serum he calls Mirakuru. The precise effects of Mirakuru are unknown, as are Sebastian's true intentions, but the serum caused The Mayor's eyes to bleed before killing him. After injecting The Mayor, he instructs the officer to find him "another". The officer addresses him as "Brother Blood".
In "State v. Queen", it is revealed that he provided Count Vertigo with a means to redistribute his product, as he knew that it would flush out The Arrow so that Count Vertigo would kill him. Upon finding that The Arrow killed Count Vertigo rather than the other way round, he is initially angry, until he is informed that the first test subject has survived (or possibly awakened from) his exposure to the Mirakuru.
In "The Scientist", Sebastian was getting regular reports from Daily about movements conducted by three people looking into one of his test subjects, Maxwell Stanton's death. Sebastian gave Cyrus Gold locations of where to strike; Queen Consolidated's applied sciences division and a blood bank which were necessary for making more Miracle.
In "Three Ghosts", Sebastian learns from Daily that the police are planning to go after Cyrus Gold and sends Cyrus to confront them. Meanwhile, in his civilian guise, he romances Laurel Lance, taking her Christmas shopping, and announces his campaign for mayor of Starling.
Sebastian has his subordinate inject a captured Roy Harper with Mirakuru. When The Arrow appears, Sebastian orders Cyrus to kill him; Cyrus is defeated and Sebastian flees. He meets with Slade Wilson, who is revealed to be Sebastian's employer and the true mastermind behind the Blood Cult.
In "Blast Radius", Laurel comes to his office, questioning him about his past. Sebastian reveals that his father came back home drunk and his mother killed him, promptly abandoning Sebastian as the police were coming. Cyrus became a father-figure to Sebastian when he became orphaned. As Laurel continues to investigate Sebastian, she visits his aunt, Maya Resik, who is locked up in an insane asylum that Sebastian is paying to be cared for. As Laurel asks her about her nephew, Maya reveals that she is actually Sebastian's mother. She says he killed his father and blamed her. She then begins to refer to him as the devil.
In "Blind Spot", he visits his mother Maya in the psychiatric institution, and kills her after discovering she told Laurel Lance the truth about his father's murder. After Laurel and the Arrow try to steal the police file on Sebastian's father's death, Slade threatens him and tells him to deal with Laurel, whose investigation is becoming a problem for them. He then sends Officer Daily to search and ransack Laurel's apartment and arrest her for possession of drugs. Afterwards, he has Daily kidnap Laurel and pose as the "Masked Man" in order to draw out the Arrow and remove suspicion. After Daily is killed, Sebastian is scolded for causing the death of four followers with his sloppiness by Slade. He is also warned that if he slips up one more time, he will the fifth casualty.
In "Heir to the Demon", Sebastian is contacted by Oliver and was told he was withdrawing his support for him and is now supporting his mother Moira Queen. He is okay with it stating that blood of family is more important and tells Oliver it will not jeopardize their friendship. Immediately after he meets with Moira in Queen Consolidated and demands she withdraw from her campaign, and Moira challenges him not to underestimate her after Blood asks which side of Moira will people would see, the strong leader, or the one manipulated by Malcolm Merlyn.
Afterwards he meets with Slade and is informed Slade will be handling Moira Queen personally.
In "Deathstroke", Sebastian, fully masked, kidnaps Thea after Slade takes her to his hideout. Later he attends a mayoral debate against Moira Queen, which is interrupted by a video of a frightened Thea, broadcast by Slade and his henchmen. Later, he meets with Slade and Isabel Rochev at Queen Consolidated. He argues with Slade, furious that Thea's kidnapping has resulted in a sympathy vote for Moira that will all but assure her victory in the election, and demands that Slade fulfill his promise to give Sebastian control of Starling City.
In "Seeing Red", Moira visits Sebastian in his office to tell him that she is dropping out of the election, which confuses him; however, he understands once Moira tells him that she needs to be with Thea as she is going through a tough time. However later Moira decides against it and on TV announces that she will continue to run for mayor, much to Sebastian's annoyance.
In "City of Blood", after Moira is murdered by Slade, Sebastian officially becomes mayor of the city. Sebastian later attends Moira's funeral reception where Laurel becomes suspicious of him again as he became mayor just after Moira's death. Sebastian was contacted by Slade when he was settling into his new office and told him to remember who he was still working for, and was later visited by Laurel claiming to need help with a case but secretly bugged his computer. Laurel later with Quentin and Kelton discovered that Sebastian had written a condolence letter the day before Moira died and Laurel told Oliver, now aware that he was Arrow, that she was right. Later Oliver personally met with Sebastian to tell him that he is the Arrow and tries to understand Sebastian's motives and he explains that Slade will destroy the city with his army and the people will be in a time of chaos and fear, so they will turn to Sebastian for guidance and he will lead the city into a new age. Later Sebastian wore his mask to talk to Slade's army unaware that Oliver and Diggle were rigging the place to explode. Brother Blood told the troops that they will become a vital part of the Starling's future.
In "Streets of Fire",, while Starling City was being destroyed, Sebastian was perfectly calm, until one of Slade's soldiers snapped Kate Spencer, the district attorney's neck. Sebastian immediately goes to Slade and complains about what happened, only for Slade to say that he is going to reduce Starling City to rubble. Sebastian then steals the cure of Mirakuru from Slade, and brings it to Oliver. He says that the mask he wore was the image of his father that gave him nightmares every night and he created it to overcome his fears. He says that when the destruction is all over, he will try to bring Starling City into a new era. When Oliver states that the people would never accept him after what he has done, Sebastian says that if Oliver exposes him, he will expose Oliver. Oliver then leaves. Later, Isabel approaches Sebastian. After realizing that Sebastian gave away the cure for Mirakuru, Isabel kills him.
As an alderman, Sebastian had shown himself to be charismatic, thus able to win over crowds and win support to the point where Starling City wants him to become mayor. As a cult "leader," he kidnaps victims and injects them with Mirakuru, and if they survive, forces them to work for him. He was also evil and ruthless.
As an agent of Slade Wilson, Sebastian was shown as cowardly and weak by comparison. His superior was constantly criticizing and threatening him for this behavior, as well as his failures against The Arrow. Yet despite acting as an underling of Deathstroke, Sebastian was very willful and could very well have his own agenda concerning the Mirakuru experimentation. In "Three Ghosts", he claims that he intends to use the Mirakuru for the betterment of Starling City. Interestingly, his anger was aroused at the death of Brother Daily, to the extent that he took four bodyguards with him to personally confront Slade (who subsequently killed the bodyguards and threatened Sebastian's life should he fail again). Although this might indicate that Sebastian possesses a level of attachment for his devoted cultists, it should be remembered that he gave orders to Daily to impersonate "the man in the skull mask", knowing well that it would result in Daily's death. Consequently, it was very possible that Sebastian considers his crusade as Brother Blood to be not only justified, but righteous as well.
Upon being elected mayor, it becomes ever more apparent that he was a megalomaniac. He truly believes that he knows what's best for Starling City. He claims that working with Slade will allow him to achieve his goals, and that after Slade's army has destroyed Starling City, the people will rally to his side and he will be able to lead them to rebuild the city according to his grand vision. He had also hinted that he sees himself as the only person who can fulfill his parents' legacy.
- Popularity: On Sebastian's alderman side, he is popular, as Starling City wants him to become mayor. He has shown to be capable of winning positive attention.
- Commanding: As a secret cult member, Sebastian is more evil and ruthless, as he captures criminals and injects them with Mirakuru. If they survive initial injection, he forces them to work for him. This could be a vigilante type thing, as he believes he is saving the city with Mirakuru.
- Brother Blood mask: Sebastian wore a skull mask as his villain alter-ego Brother Blood, to hide his identity from his victims.
- Voice Filter: Sebastian had this device fitted in to the mask, and spoke to anyone using it when he wore the mask.
- In the DC comics, Brother Blood is the leader of the "Church of Blood", a cult that worships the demon warlord Trigon. He is a recurring enemy of Trigon's daughter Raven, and her friends, the teen hero group The Teen Titans. Also, the Church of Blood was used by Raven to resurrect Deathstroke's son, Joseph Wilson.
- There have been multiple men who have carried the name "Brother Blood". However, Arrow's version of the character carries the name of the last Brother Blood prior to the New 52, named Sebastian.
- Sebastian's last name "Blood" is the English translation of his father's last name "Sangre".
- Despite allying himself with Slade, he was never truly aware of the truth behind Slade's plans until it was too late. To make up for his mistake, he gave Oliver the Mirakuru cure, before getting stabbed by Isabel.
- He was the Twentieth person to discover Oliver Queen's secret identity; as The Arrow. He discovered this in "City of Blood". Hearing this from Oliver himself.