Brandon Starks Son- OC Where do we go from here

had cooked up this character and i really just needed help where to go with Artos if you have any ideas or Advice feel free to leave it down below

Regarding his bio: 

Artos Sand was born in 282 AC to Princess Dorea Martell and Brandon Stark. Dorea had attended the Tourney at Harrenhal, where Brandon Stark was immediately taken with her beauty. Dorea, too, pursued Brandon—motivated by deeper reasons tied to prophecies of the Prince That Was Promised and the union of Ice and Fire.

She died giving birth to Artos, her last words foretelling a strange vision: she spoke of dragons going mad and declared that her son would “bring the dawn and end the night of terror slay the bloody Kraken.” When Eddard Stark first saw the boy’s eyes—so strikingly like his brother Brandon’s—he acknowledged Artos as his brother’s bastard.

Artos spent his early years in Sunspear, where he grew up close to Tyene Sand, Arianne Martell (aged down to match his age), and several other noble children of Dorne.

At the age of twelve, Ned Stark and Doran Martell decided it was no longer fitting for Artos to remain in Dorne and arranged for him to squire under Lord Yohn Royce of Runestone.( with the help of Jon arryn) Artos thrived under Yohn's household and grew especially close to his sons, Robar and Waymar Royce. The trio were inseparable and often found themselves in trouble—whether in taverns, brothels, or the training yard he was always a better swordsmen then the brothers.

During his time there, Artos fell in love with Alyssa Royce, Yohn Royce’s second daughter. The two grew close, and Artos eventually took her maidenhead.

He was knighted at the age of fifteen—a rare feat for one so young. His knighthood was earned after he killed the famous Outlaw Ser Osric Crakehall, where he distinguished himself with valor and skill. after he is knighted he goes back to Sunspear and stays there until the story starts you may be asking why didn't he do anything in the first two books he was going to fight for Robb but his Lover Arianne Stopped him. as a person is, as established: Artos Sand is a charismatic yet emotionally hollow man, burdened by prophecy and legacy. Witty, bold, and fiercely skilled, he masks deep-seated emptiness with sex, violence, and sarcasm. He’s loyal to those he loves, but struggles with belonging and purpose. Haunted by loss and destiny, he moves through life as both a sword and a shield—fighting for justice while avoiding his own pain. Beneath his bravado lies a man aching to be more than a bastard and to be remembered.

Very morally ambiguous: He's capable of both acts of great mercy and compassion, as he is capable of depravity and cruelty.

Now, you might be asking—what does Artos actually do in the books?

In A Game of Thrones, he doesn’t appear on the page; he's in Dorne but is mentioned frequently, especially by Ned Stark. The same goes for A Clash of Kings, though by this point, Robb Stark, increasingly desperate about House Stark’s potential extinction, legitimizes both Artos and Jon.

But—and this is a major but, like Cersei-sized—Artos plays a semi-major role in A Storm of Swords. He arrives in King’s Landing alongside Oberyn Martell. He shares scenes with Tyrion, and since it's from Tyrion’s POV, there’s a running theme of Tyrion noting how beautiful Artos is. He also shares a quiet, kind scene with Sansa over lemon cakes, and it’s implied she develops a crush on him. He leaves the city a day before Tyrion’s trial by combat but not before hinting that he may have slept with Cersei. Tyrion tells him, “A great swordsman can make a great friend, but the ones who can control things without ever drawing steel are the best of friends.” That line sticks with Artos and influences his thinking in A Feast for Crows.

In A Feast for Crows, things get interesting. Artos is appointed Lord justiciar  and Lord Marshall to help Arianne as she was appointed princess regent We get POV chapters from him. He begins using the political lessons learned from Lady Dustin and starts reforming the city. He removes the corrupt City Watch of Zahari’s Gate, executes the dishonorable Lord Commander, and establishes the Suncloaks—a new guard force composed of fighters he believes are honest and capable. Artos looks up to Baelor Breakspear and strives to bring justice and rule with fairness, just like his hero. However, Maester Myles, Ricasso, and Lady Alyse Ladybright deeply distrust Artos and begin scheming to strip him of his power. Ser Manfrey Martell—an aging noble with many children—is targeted by Artos through blackmail. In exchange for silence about an unknown scandal, Artos pressures Manfrey to allow him to arrange strategic marriages for his children.

He is Forced to sort out the New Vulture Clans with the Dornish Hill clans.

He marries one of Manfrey’s sons to the recently widowed Janna Tyrell, and weds Manfrey’s second-youngest daughter to Lord Monterys Velaryon. One of Manfrey’s bastard daughters is married off to Garrett Flowers, and several others are married to various Freys, expanding Artos’s influence across Westeros.

At this point, Artos is riding high on power. He's openly sleeping with Arianne Martell, holding court, and reveling in his growing authority.

But then, during court, a bloodied boy no older than thirteen appears before him. The boy claims that Ser Ryam Yronwood raped his sister, and that Ryam’s mother orchestrated the deaths of his father and two elder brothers. Furious, Artos summons Ryam to court, offering mercy—not death—but proposes gelding as punishment. Then he backtracks and suggests sending Ryam to the Wall instead.

Ryam, enraged, calls Artos a “bastard dog playing prince.”

Artos beheads him on the spot.

Prince Doran Martell, recovering from a long sickness, is furious at Artos’s rashness. Around this time, the Queenmaker plot begins to unfold. Artos is involved, and when Darkstar attempts to attack Myrcella, Artos duels him. Though Artos slashes out one of Darkstar’s eyes, Darkstar and his band manage to escape.

In the aftermath of the failed plot, Artos is captured by Doran. His guards- two lowly angry Hedge knights Artos has dreams of a man with dead golden lions around him as he is lifted up by mummers with a burning sword in hand with dragons flying around him and a red commet flying down .

But Artos wargs into a large tabby cat, escapes his cell, and kills both the hedge knights with brutal efficiency. He steals Holt’s dagger and sneaks into Prince Doran’s chamber, fully intending to kill him.

Doran, however, masterfully talks him down. With calm persuasion, he acknowledges Artos’s rage but redirects it. He gives him a mission. now this is where am stuck with his ADWD Plot he could : Join Quentyn to Seek Daenerys , Go North to Stannis , Hunt Down Darkstar with Obara ( notes Artos visted Winterfell first at 7 , then 9 , then 12 , then 15 so like 4 times ) ( also During AFFC i am really stuck with his POV chapters in that book also his childhood and maybe even his parents and birth i want him to be in the world nobilty