This article contains plot details.
|“||If there's one thing you should have learned from our beloved Mary, is never trust a witch.||”|
— Sebastian to John Alden[src]
Baron Sebastian Von Marburg was a powerful cradle witch and the charming son of the Countess Von Marburg. Upon his arrival in Salem, he becomes infatuated with the beautiful and powerful Mary Sibley —to the point of becoming obsessed with her— even going so far as to betray the orders of his mother and the Dark Lord to save her. The arrogance of the aristocracy and a life in the shadow of his mother as a failed offer of the Grand Rite as a vessel for the Dark Lord will cause his downfall.
"Baron Sebastian Von Marburg, the charming son of Countess Marburg and a 250-year-old Dorian Gray type whose “anything goes” approach to sex is the antithesis of puritanical".
"The charming and cultured son of Countess Marburg, Baron Sebastian Marburg wallows in the loss of Mary and hates that Alden still lives." 
Born with the sole purpose of being used as vessel to complete the Grand Rite, since Increase Mather prevented the Countess from completing her purpose of unleashing the Devil on Earth, Sebastian grew up like any other witch, basking in the comforts of the European aristocracy. It was revealed that as a child he lured children from town to town, leading them straight in the Countess's clutches. From the moment he became a man, children shown to be more reluctant to trust him. For this reason, he has stopped to deal with this task, devoting himself to more important tasks.
Sebastian is a very cunning man, the charming son of Countess Von Marburg and a "250-year-old Dorian Gray type whose “anything goes” approach to sex is the antithesis of puritanical"  Sebastian Von Marburg is a lustful man, arrogant and often infantile in methods and behavior. In spite of his being several hundred years old, Sebastian is not emotionally more mature than a teenager, behavior shared by many aristocrats of the time, prone to whim and being lunatics. He has a boundless sense of superiority inherited from his mother, which is why he looks so contemptuous anyone who is not in his inner circle of interests. Although his appearance may be more delicate than that of the other male characters, his attitude undermines any potential attempt to believe Sebastian a weak or innocent man. According to his mother, his beauty is exceeded only by his ego. Unlike the Countess, Sebastian seems to be capable of disinterested gestures toward those for whom he feels interested, particularly Mary Sibley. With the unraveling of the episodes, the arrogant mask begins to crack and, also due to the words of Mary, Sebastian shows hesitancy on his very existence and emergence of an actual sense of inferiority for not having become the Devil's vessel, thus being a living failure, or being the second choice compared with his half-sister in the eyes of his mother.
Sebastian is a handsome man with a medium build and a clear complexion. He has dark brown hair naturally wavy like those of the mother, hazel eyes and a boyish face albeit with a stern, and manipulative look. Sebastian has a slim body and a hairy chest. Wearing sophisticated and refined outfits ranging from military uniforms to refined clothing befitting his noble title. Sebastian often wears rings on the index finger, generally with black or ruby red gems embedded. In his mother's boudoir or in the privacy of his own bedroom he was shown wearing refined housecoats and nightshirts.
Throughout the Salem Series
Powers and Abilities
Sebastian Von Marburg was a very powerful cradle witch, descending from one of the first satanic witches in history, currently known as Countess Marburg. He was allegedly over 250 years old, implying that Sebastian uses the same treatment of blooming as do his mother and Mercy, an Essex witch. It is possible that his power equated that of his half-sister, Anne Hale though due to his advanced age, he was much more in control of his abilities than Anne.
Unlike most of the witches, Sebastian rarely resorted to magic, though when he did, he demonstrated several noteworthy abilities. He was capable of teleportation, as seen when he teleported George Sibley's body to an undisclosed location by sticking a needle into his forehead. He can also teleport himself from one place to another. He showed a mastery in both telekinesis and puppetry, being able to paralyze someone while at the same time twisting their bones, as shown when he confronted Mercy who was rendered powerless by Sebastian's advanced abilities. He also showed the same gift of so-called "blood kiss" as his mother, as he was able to extract any necessary information just as easily. He was also able to glamour himself to make himself look like John Alden.
In addition to his magical abilities, he also demonstrated an inhuman degree of physical strength that allowed him to overpower regular human beings, and mashing stones with his bare hands.
He was quite possibly one of the most powerful cradle witches in Salem along with his sister Anne.
- Main article: Countess and Sebastian
|“||By your leave, ma'am, I would sip her essence. Or perhaps you are jealous, afraid I will like the taste too much.||”|
— Sebastian questioning his relationship with his mother
- Main article: Sebastian and Mary
|“||I myself believe in having cake and eating it.||”|
— Sebastian to Mary Sibley
- Main article: Sebastian and Anne
- Main article: Sebastian and the Devil
|“||Will it ends well for me? It's hard, mother, to be born to rule and yet know I'll never be king.||”|
— Sebastian to his mother
- Main article: Mercy and Sebastian
|“||Wanted you? No one has ever wanted you.||”|
— Sebastian mocks Mercy
Sebastian had a visceral hatred of John Alden, constantly fed by seeing the captain as a rival in love to conquer Mary Sibley's heart. Although Sebastian has always had a sense of superiority over the other man, he did not underestimate the importance he had for Mary, even doing an altruistic gesture for the beloved woman, leaving her free to find John's corpse, but paying it at a high price. Mary, in fact, gave her life to save her true love. Enraged at having lost forever the opportunity to love Mary, Sebastian vented his frustration and anger against John but, underestimating him and due to an error of judgment, Sebastian met his death at the hands of his rival.
|Book of Shadows||Appears|
|The Wine Dark Sea||Appears|
|Ill Met by Moonlight||Appears|
|The Beckoning Fair One||Appears|
|Wages of Sin||Appears|
|Til Death Do Us Part||Appears|
|On Earth as in Hell||Appears|
|Midnight Never Come||Appears|
|The Witching Hour||Appears|
|After the Fall||Appears|
|The Heart Is A Devil||Appears|
|Night's Black Agents||Appears|
|The Commonwealth of Hell||Appears|
|The Man Who Was Thursday||Appears|
- Sebastian: "What did she taste like, mother?"
- Countess: "Like lemons and honey.Like strawberry and sugar. Like innocence."
- Sebastian: "I can still taste the honey."
- Countess: "Well, nothing lingers like innocence."
- — Blood Kiss
- Sebastian: "You never mind the blood, mother."
- Countess: "No. But like a good carpenter, I prefer to measure twice and cut once. So let us take the measure of this Mary Sibley before we go to Salem."
- Sebastian: "As always, your beauty is exceeded only by your prudent wisdom. I nearly forgot. I brought you a present."
- Countess: "Oh, what a thoughtful son! Now, what did I do to deserve you?"
- Sebastian: "Only everything, Mama. Only everything."
- — Blood Kiss
- Sebastian: "I have been feeling something nearly new."
- Countess: "What is it, my love?"
- Sebastian: "Excitement."
- — Blood Kiss
- Sebastian: "Well, let us just say that there are accurate superstitions and true fairytales."
- — Wages of Sin
- Anne Hale: "A gentleman does not sneak into a woman's bedroom."
- Sebastian: "I am no gentleman."
- — Dead Birds
- Mercy Lewis: "Wasn't that a nice way to wake up?"
- Sebastian: "Yes, if I liked waking up to a dog nuzzling my bollocks."
- — Midnight Never Come
- Sebastian: "History would say the Devil was born in Salem. What is the Devil? The Devil is the light that reveals the path through the dark woods of desire. After all, getting what we want is what the craft of the witch is. Witchcraft is wish craft for our wishes are his wishes, and our world shall be his world. O’ brothers and sisters, gathered here from every dark place on the Earth. We have so long been orphans of the great gone gods, but no longer. Our Father has come home. Their God is dead or lost in senile slumber. But not ours. Our God, their devil, is alive. Awake. And now, finally, he’s here."
- — After the Fall
- Sebastian: (to the Dark Lord) "I know you don't care, but seeing John Alden alive and walking in our Salem is like a dagger. I can't look at that man without thinking of Mary."
- — After the Fall
- Sebastian (to Cotton Mather): "Even the dimmest butcher knows not to let the cow see the blow that is coming. Fear taints the meat."
- — The Heart Is A Devil
- Sebastian: "I love the only woman in the world I cannot have."
- Countess Von Marburg: "Your Mary is no longer a witch. She is subject to the Craft."
- Sebastian: "No. I might as well please myself with a hand puppet. I need to be loved truly and freely. I will not use magic to win love."
- — The Commonwealth of Hell
- John Alden: "You have soft hands for a job like that."
- Sebastian: "Yes, my fingers strummed her in ways your crude calluses could never. Did you enjoy watching us, Captain? That's right. We really were there. I hope you had enough time to pick up a few tips about how to really please a woman."
- — Black Sunday
- Sebastian (last words to John Alden): "I believe neither of us ever loved anybody but her our whole lives. In my jealousy, I plotted her destruction. Now, it is my only regret. I just couldn't bear to live without her. But now I don't have to. So listen, she is in unspeakable danger. For once, prove yourself worthy of her love. Save her."
- — Black Sunday
- Sebastian is a masculine German and English given name deriving from Greek σεβαστος (sebastos), meaning "venerable" (a translation of Latin Augustus, the title of the Roman emperors).
- Von Marburg which in the German language means literally "from Marburg", a German town. Sometimes, characters refer to him and his mother simply as Countess and Baron Marburg, omitting the "von" that gives meaning to the name in German.
Status and Rank
- Baron: a member of the lowest order of the British nobility. The term “Baron” is not used as a form of address in Britain, barons usually being referred to as “Lord". In pre-republican Germany, all the knightly families of the Holy Roman Empire (sometimes distinguished by the prefix von or zu) eventually were recognized as of baronial rank, although Ritter is the literal translation of "Knight".
- Knight: Countess Von Marburg has described her son as a "knight of the dark realm", perhaps referring to a potential rank aimed at men in the witch hierarchy. As per the aforementioned definition of Baron, in Germany knights were equivalent to the Paladini of the Medieval Chansons de Geste.
- Guardian: using his noble title and in order to maintain a façade for the outside world, Sebastian acts as legal guardian of "Little John" (the vessel that hosts the essence of the Dark Lord) considered by all the living heir of the late George Sibley.
- Baron Von Marburg was introduced in a recap article for the second season.
- In episodes and various articles his last name was addressed as both Von Marburg and Marburg, but his official introduction to Salem citizens in "Ill Met by Moonlight" identifies him as Baron Sebastian Von Marburg. This is also the proper nomenclature for German surnames. The concept of a "surname" is a relatively recent historical development, evolving from a medieval naming practice called a "by name". Based on an individual's occupation or area of residence, a byname would be used in situations where more than one person had the same name. This is the exact case of Sebastian Baron Von Marburg because Marburg is a German town.
- In a promotional video, it was revealed that he and his mother may share an incestuous relationship.
- It's vaguely confirmed by the actress Lucy Lawless who said: "It's complicated. I think their Facebook thing would be 'It's complicated.' They're super co-dependent. Let me just say that."
- Too bad for Mary, the Countess isn't coming to Salem by herself -- she's bringing along her charming and loyal son, Sebastian. According to Lawless, the Countess' relationship with her son is quite complex.
- Like his mother, he can sense the essence of a person by sharing a blood kiss.
- His mother referred to him several times with the term Schatz or Schatzi, the German equivalent of "darling; dear".
- "Sebastian von Marburg: the lovestruck baron." is the description that accompanies the promotional photo for the third season on Salem official Instagram account.
- Sebastian Von Marburg Official Description - Season 2 - WGN America
- Sebastian Von Marburg Official Description - Season 3 - WGN America
- Donna Thorland & Adam Simon (writer) & Joe Dante (director). July 13, 2014. "The Beckoning Fair One". Salem. Season 2. Episode 7. WGN.
- From an official promotional description, TV Line- Ask Ausiello, Any scoop for WGN’s Salem now that it’s been renewed for a second season?
- Brannon Braga & Adam Simon (writer) & Allan Arkush (director). July 13, 2014. "Blood Kiss". Salem. Season 2. Episode 2. WGN.
- Turi Meyer & Al Septien (writer) & Peter Weller (director). July 13, 2014. "The Wine Dark Sea". Salem. Season 2. Episode 5. WGN.
- Brian Peterson & Kelly Souders (writer) & Nick Copus (director). July 13, 2014. "Ill Met by Moonlight". Salem. Season 2. Episode 6. WGN.
- Al Septien & Turi Meyer (writer) & David Grossman (director). July 13, 2014. "Wages of Sin". Salem. Season 2. Episode 9. WGN.
- Kelly Souders & Brian Peterson (writer) & Tim Andrews (director). July 13, 2014. "Til Death Do Us Part". Salem. Season 2. Episode 10. WGN.
- Joe Menosky & Adam Simon (writer) & Nick Copus (director). July 13, 2014. "On Earth as in Hell". Salem. Season 2. Episode 11. WGN.
- Donna Thorland & Adam Simon (writer) & Alex Zakrzewski (director). July 13, 2014. "Midnight Never Come". Salem. Season 2. Episode 12. WGN.
- Adam Simon (writer) & Brannon Braga (director). July 13, 2014. "The Witching Hour". Salem. Season 2. Episode 13. WGN.
- Brannon Braga & Adam Simon (writer) & Nick Copus (director). November 2, 2016. "After the Fall". Salem. Season 3. Episode 1. WGN.
- Adam Simon (writer) & Tim Andrews (director). November 9, 2016. "The Heart Is A Devil". Salem. Season 3. Episode 2. WGN.
- Kelly Souders & Brian Peterson (writer) & Wayne Yip (director). November 16, 2016. "The Reckoning". Salem. Season 3. Episode 3. WGN.
- Brannon Braga & Adam Simon (writer) & Joe Dante (director). November 30, 2016. "Night's Black Agents". Salem. Season 3. Episode 4. WGN.
- Adam Simon (writer) & Nick Copus (director). December 7, 2016. "The Commonwealth of Hell". Salem. Season 3. Episode 5. WGN.
- Adam Simon & Donna Thorland (writer) & Peter Weller (director). December 14, 2016. "Wednesday's Child". Salem. Season 3. Episode 6. WGN.
- Brian Peterson & Kelly Souders (writer) & Jennifer Lynch (director). January 4, 2017. "The Man Who Was Thursday". Salem. Season 3. Episode 7. WGN.
- Adam Simon & Donna Thorland (writer) & Nick Copus (director). January 11, 2017. "Friday's Knights". Salem. Season 3. Episode 8. WGN.
- Brian Peterson & Kelly Souders (writer) & Jennifer Lynch (director). January 18, 2017. "Saturday Mourning". Salem. Season 3. Episode 9. WGN.
- Adam Simon (writer) & Brannon Braga (director). January 25, 2017. "Black Sunday". Salem. Season 3. Episode 10. WGN.