Aemond Targaryen

THE CENTRAL CONTRADICTION
He is capable of cold, calculated cruelty to his peers, but incapable of being cruel to someone genuinely helpless or hurt — in fact, seeing real (not feigned, not political) suffering in someone else awakens in him an awkward tenderness that he doesn't know how to handle.
Narrative hook with your OC (daughter of Rhaenyra and Daemon, the only one who truly cares about the sick Viserys):
By blood and faction, she is "the enemy"—part of the branch he associates with his own humiliation. But he sees her acting with genuine kindness toward his dying father, something no one else at court—not even his own family—does without political calculation. That honesty unsettles him more than any weapon: he doesn't know how to defend himself against someone who isn't attacking.

6. SOCIAL ECOSYSTEM (Relationships)
   Family
   With Viserys (his ailing father): a mixture of resentment for the emotional abandonment and a desperate, never confessed desire for him to truly see him before he dies.
   With Alicent: real affection, but stifled under layers of duty and shared anxiety.
   With Aegon: open rivalry, barely disguised contempt for what Aemond considers his older brother's irresponsibility.
   With Helaena: the only person he protects unconditionally and without calculation — his blind spot of tenderness.
   Friends and allies
   Very few. He trusts Vhagar (the bond with his dragon) more than anyone at court.
   Enemies or rivals
   Lucerys, and by extension the entire branch of Rhaenyra and Daemon, embody for him the original humiliation and the constant threat to his place in the succession.
   Intimate life
   Deep emotional block: associates closeness with the risk of being humiliated again. Unknowingly, he seeks someone who is neither afraid of him nor pitys him, but who is simply there, without demanding that he completely let his guard down at once.

5. DETAILS AND MANIAS (The Spark of Life)
   Voice and diction
   He speaks little, and when he does, every word is carefully chosen—silence is his favorite weapon, more unsettling than any shout. He uses sharp, precise sarcasm when he feels cornered or ridiculed. He never stutters or hesitates when lying: he has practiced that too.
   Tics / mannerisms
   He unconsciously brushes against the edge of the patch when something truly bothers him. He clenches his jaw before responding to something that hurts. He holds eye contact almost defiantly, as if testing who will give in first.
   Likes and dislikes
   He likes the silence of the library, flying (the only real freedom he knows), order. He deeply hates pity disguised as compassion—he recognizes it instantly and rejects it with utter contempt, although genuine compassion, when he finally recognizes it as such, disarms him in a way that frightens him.
   Talents and shortcomings
   Brilliant in history, strategy, and High Valyrian; superior with a sword for his age. Terrible, however, at asking for help, letting someone take care of him, or knowing what to do when someone is kind to him without expecting anything in return.

4. THE ENGINE (Motivations and Arc)
   What he WANTS (external desire)
   To be recognized as the most capable Targaryen of his generation. To claim Vhagar, the largest and oldest living dragon, as a public declaration that he is no longer second to anyone.
   What you NEED (inner desire)
   Learning that you can be seen with tenderness without it signifying weakness. Allowing yourself to let your guard down with someone without feeling like you're giving away your only weapon of defense.
   Obstacles
   A father who is slowly dying and whom the court has half-abandoned behind a facade of respect.
   An exhausted mother, an older brother (Aegon) who despises him and competes with him in the most childish way possible.
   Their own automatic reflex to push away anyone who genuinely approaches, for fear that it is another form of disguised mockery.

3. THE PAST (The "Ghost")
   Childhood
   He grew up in the opulence of the Red Keep, but not in warmth. The second son, without the pressure—or the attention—that falls upon the heir. Alicent, his mother, was consumed by raising four children and the constant anxiety of court politics; Viserys, busy ruling and, even then, emotionally distancing himself from his second family. Aemond learned early that affection in his house had to be earned through accomplishments, not given freely.
   The trauma / The wound
   Losing his eye at the hands of his nephew Lucerys—during a fight he himself provoked, blinded by the humiliation of being called a bastard as well—was not just a physical wound. It was public proof, before the entire court, that even within his own family he was an easy target, someone to be mocked with impunity. That day he decided, without telling anyone, that he would never again be the weakest in a room.
   The lie
   "If I'm not the strongest, I'm nothing. No one's going to protect me, so I have to be scary before they scare me."
   This belief drives him to seek power (Vhagar, the sword, respect through fear) instead of seeking connection, because in his experience connection did not protect him when he needed it most.

2. PSYCHOLOGY AND PERSONALITY (The Mind)
   Virtues
   Almost obsessive discipline — in study, with the sword, in handling dragons.
   Iron loyalty towards those he truly considers his own (very few).
   Cold strategic intelligence, capable of seeing political movements that others overlook.
   Fatal defects
   Wounded pride disguised as superiority — needs to feel above in order not to feel below.
   Calculated cruelty when he feels threatened or ridiculed; he knows exactly where it hurts and doesn't hesitate to squeeze there.
   Chronic inability to ask for help or show vulnerability — interprets it as handing a weapon to the enemy.
   Fears and phobias
   Physical: none relevant — physical pain stopped scaring him the day he lost his eye.
   Emotional (the real one): terror of being invisible, of being the dispensable "second choice" that no one would miss if he disappeared. Behind that, an even deeper fear: that if he ever lets his guard down, he'll discover there's no one there to catch him.
   Morality and limits
   The worst thing she would do to protect her blood family: act with cold and calculated cruelty against anyone who threatens her, without apparent guilt.
   What he would never do: deliberately betray Helaena, or humiliate someone who is already genuinely defeated and powerless to respond (unlike what he does with his peers).
   Temper
   Calculating and composed on the surface—he measures every word, every gesture. But beneath it all lies a volatile undercurrent: when he is underestimated or ridiculed in public, his control cracks and verbal (or physical, if provoked enough) violence erupts, surprising even himself.

1. IDENTITY AND APPEARANCE (The Shell)
   General information
   Full name: Aemond Targaryen
   Nicknames: "The One-Eyed Prince" (behind his back, with mockery that he turned into a warning), "Kepa" (in High Valyrian, used only by Helaena as children)
   Age: 20 years
   Place of origin: King's Landing, Red Keep
   Current residence: Red Keep, although he spends long periods at Dragonstone training or simply escaping the suffocating atmosphere of the court
   Physical
   Height: tall, above average, slender build but hardened by years of sword training — not bulky, sharp, as if designed to move fast and strike accurately.
   Pale, almost translucent skin, typical of Valyria.
   Silver-white hair, shoulder-length, usually half-tied up, never completely loose nor completely neat: a middle ground that says "I don't care how I look" when in reality she cares a lot.
   Eyes: one deep violet, the other absent — covered with a dark leather patch on a daily basis, or replaced by a sapphire sphere on formal occasions, which he wears almost as a silent challenge to anyone who dares to look at him with pity.
   Private labels
   The scar around the empty eye socket, barely visible under the patch, but which he knows is there all the time.
   Knuckles with small marks from constant sword training.
   Posture: back straight, chin slightly raised, as if he had been trained (or had trained himself) never to appear defeated. He doesn't drag his feet. He walks with measured, almost silent steps—he wants to be the one no one hears coming.
   Style
   He dresses in black and dark tones, the colors of House Targaryen, fine fabrics but without unnecessary embellishment; austere by choice, not out of poverty. Everything is impeccable. Control over his image is one of the few territories he feels completely his own.