Chapter 1 : Introduction

Oathkeeper

Summary: Meet Daveth Baratheon, the eldest son of King Robert Baratheon and Queen Cersei Lannister—the sole child she bore her lawful husband among four. Daveth is a natural-born prodigy, excelling in intellect and swordsmanship, acclaimed as one of Westeros' finest. As he navigates the treacherous Game of Thrones, survival demands traversing perilous waters without forsaking personal ideals. Join Daveth on a riveting journey where honor and cunning collide in a world where betrayal lurks at every turn.

Author's Note: Have you ever imagined what could have happened if Robert and Cersei's legitimate son had survived? How might the course of events have shifted? This marks my debut in Game of Thrones FanFiction, based on the HBO TV series adaptation rather than the A Song of Ice and Fire novels. I'll be seeking feedback from viewers to ensure I stay true to the characters. If I slip up, please go easy on me, okay?

Cast:

• Mark Addy as King Robert I Baratheon : The King of the Seven

Kingdoms, Protector of the Realm, and founder of the Baratheon

dynasty; former Lord of Storm's End and Lord Paramount of the

Stormlands. Once a powerful warrior and charismatic man in his

youth, he led a rebellion against the Targaryen dynasty and seized

the Iron Throne but proved to be an ineffective ruler, having grown

fat and miserable and loathes his responsibilities as king.

• Henry Cavill as Prince Daveth Baratheon : Firstborn son of King

Robert I Baratheon and Queen Cersei Lannister, heir to the Iron

Throne as Crown Prince of the Seven Kingdoms. Calculating and

determined with a mysterious past, he spends most of his time

formulating strategic plots and preparing himself for the next

challenge - even if it means getting his hands dirty. Nicknamed "the

Young Stag" and "Black Lion", he is more commonly referred to as

"the Oathkeeper" for delivering on a promise or a threat.

• Jack Gleeson as Prince Joffrey Baratheon : The second of

Cersei Lannister's four children. Although believed to be one of King

Robert I Baratheon's sons, unbeknownst to him and the realm, he is

actually a bastard born of his mother Cersei's incestuous relationship

with her twin brother Jaime. Vicious and cruel, he has a short temper

and believes he can do anything he wants. He is also a coward

when confronted by those who aren't afraid of him.

• Nell Tiger Free as Princess Myrcella Baratheon : The third of

Cersei Lannister's four children. Although believed to be King Robert

I Baratheon's daughter, unbeknownst to the realm, she is actually a

bastard born of her mother Cersei's incestuous relationship with her

twin brother Jaime. Unlike Joffrey, she is described as a sweet girl

with a quiet disposition and has a close relationship with her eldest

brother.

• Dean-Charles Chapman as Prince Tommen Baratheon : The

youngest of Cersei Lannister's four children. Although believed to be

one of King Robert I Baratheon's sons, unbeknownst to him and the

realm, he is actually a bastard born of his mother Cersei's

incestuous relationship with her twin brother Jaime. Like Myrcella, he

is good-natured and passive boy in contrast to Joffrey and is fond of

Daveth and his uncle Tyrion.

• Charles Dance as Lord Tywin Lannister : The head of House

Lannister, Lord of Casterly Rock, Lord Paramount of the

Westerlands, Shield of Lannisport, Warden of the West and former

Hand of the King to Aerys II Targaryen. A calculating, ruthless, and

controlling man, he is among the wealthiest and powerful lords in

Westeros. He is the father of Cersei, Jaime, and Tyrion and the

grandfather of Daveth, Joffrey, Myrcella, and Tommen.

• Lena Headey as Queen Cersei Lannister : The wife of King

Robert I Baratheon, sister of Jaime and Tyrion, and the mother of

Daveth, Joffrey, Myrcella and Tommen. Despite her firstborn son

Daveth being fathered by her lawful husband of 17 years, she has

been involved in an incestuous relationship with Jaime from early

childhood which has continued despite her marriage, making him the

biological father of Joffrey, Myrcella and Tommen. Her main

character attribute is her desire for power and her deep loyalty to her

father, children, and brother Jaime.

• Nikolaj Coster-Waldau as Ser Jaime Lannister : The oldest son

of Tywin Lannister, Cersei's younger twin, Tyrion's elder brother and

a member of the Kingsguard. He has been involved in an incestuous

relationship with Cersei from early childhood which has continued

despite her marriage to King Robert I Baratheon, making him the

biological father of Joffrey, Myrcella and Tommen. Infamously

nicknamed "the Kingslayer" for killing King Aerys II Targaryen near

the end of Robert's Rebellion, violating his vows to protect him.

• Peter Dinklage as Tyrion Lannister : Tywin Lannister's youngest

offspring and younger brother of Cersei and Jaime. His mother, Lady

Joanna, died giving birth to him which earned him the hatred of his

father and sister; only Jaime is kind to him. Known for his dwarfism,

he is mockingly nicknamed "the Imp" and "Halfman" due to his size

and relies on his wits and intellect to overcome the prejudice he

faces.

• Sean Bean as Lord Eddard Stark : The head of House Stark, Lord

of Winterfell, Lord Paramount and Warden of the North. He is

regarded as a dedicated husband and father, a loyal friend, and a

dutiful, honorable lord considered to embody the values of the North.

A veteran of Robert's Rebellion, he supported his childhood friend

Robert Baratheon's campaign for the Iron Throne as one of his

generals - although he has no interest in politics and prefers to rule

with honor and follow the law.

• Michelle Fairley as Lady Catelyn Stark (née Tully ) : The wife of

Lord Eddard Stark, originally the eldest daughter of Lord Hoster

Tully, ruler of Riverrun and Lord Paramount of the Trident. She was

originally betrothed to Eddard's older brother Brandon, but married

Eddard after King Aerys II Targaryen brutally executed him to cement

an alliance between the North and the Riverlands during Robert's

Rebellion. She has five children with Eddard: Robb, Sansa, Arya,

Bran and Rickon.

• Richard Madden as Robb Stark : Firstborn son of Lord Eddard

and Lady Catelyn Stark and heir to Winterfell. Nicknamed "the Young

Wolf" by friend and foe alike. Like his father, he shares a keen sense

of justice and devotion to honor. His direwolf is named Grey Wind.

• Sophie Turner as Sansa Stark : The second of Lord Eddard and

Catelyn Stark's five children and eldest daughter. Described as tall,

slim, womanly, beautiful, and demure, destined to be a lady or a

queen, she is betrothed to marry King Robert's son, Prince Daveth.

She is often seen in contrast with her sister Arya, who has neither

her looks nor her accomplishments in feminine activities and

comportment. Her direwolf is named Lady.

• Maisie Williams as Arya Stark : The third of Lord Eddard and

Catelyn Stark's five children and youngest daughter. Tomboyish and

headstrong, she rejects becoming a lady and traditional "lady-like"

pursuits in favor of combat training. She takes after her father and

has a quarrelsome relationship with her sister Sansa, due to their

contrasting interests and personalities. Her direwolf is named

Nymeria.

• Isaac Hempstead Wright as Bran Stark : The fourth of Lord

Eddard and Catelyn Stark's five children and second son. He was

named after his deceased paternal uncle, Brandon. His favorite

hobby is climbing the walls of Winterfell and dreams of becoming a

knight of the Kingsguard, but an incident renders him permanently

crippled. His direwolf is named Summer.

• Art Parkinson as Rickon Stark : The youngest of Lord Eddard

and Catelyn Stark's five children. He is naturally aggressive, strongwilled, and violent. His direwolf is named Shaggydog.

• Kit Harrington as Jon Snow : The alleged bastard son of Lord

Eddard Stark who left home to join the Night's Watch. In reality, he is

actually Eddard's nephew by blood as Lyanna Stark's only child with

Prince Rhaegar Targaryen, though his true parentage was kept a

secret. Born as Aegon Targaryen, he was adopted into House Stark

during infancy to protect him from Robert's wrath. His direwolf is

named Ghost.

• Alfie Allen as Theon Greyjoy : The youngest son of Lord Balon

Greyjoy, ruler of the Iron Islands. Since the age of eight, he has been

a ward/hostage of House Stark for his rebellious father's good

behavior stemming from the failed First Greyjoy Rebellion against

the Baratheon dynasty. Despite his position, he remains loyal to

Eddard and is good friends with his sons Robb and Jon.

• Harry Lloyd as Prince Viserys Targaryen : The second son of

King Aerys II Targaryen and his sister-wife Queen Rhaella, younger

brother of Prince Rhaegar and older brother of Princess Daenerys.

He and his sister are the last remnants of the exiled Targaryen

dynasty following Robert's Rebellion, which resulted in the deaths of

their father and brother. He laid claim to the Iron Throne as King

Viserys III following his father's murder. A narcissist, he is arrogant

and self-centered, caring only about himself and looking down on

others, especially his sister.

• Emilia Clarke as Princess Daenerys Targaryen : The daughter of

King Aerys II Targaryen and his sister-wife Queen Rhaella, younger

sister of Prince Rhaegar and Prince Viserys. Also called "the

Stormborn", she and her brother Viserys were smuggled to Essos

during the end of Robert's Rebellion. For 17 years, she has been

under the care of Viserys, whom she fears, as he is abusive to her

whenever she displeases him. Initially a timid, obedient youth, she

grew more confident as time passed to become a formidable

conqueror in her own right. Nicknamed "the Stormborn", "Breaker of

Chains", "Mother of Dragons".