THE WARD
EDDARD STARK
The first time he sees her is on the day that comes to be known as the Sack of King's Landing. Robert had been hurt at the Battle at the Trident and needed rest but not Eddard. Ned, who went to war for his little sister, wasted no time and urged his army to march to King's Landing. After all, the only good thing about war was the end. And the end of war meant that Ned would get his sister back.
Alas, he had still not arrived in time. By the time Ned and Jon Arryn had arrived to King's Landing the Lannister army had marched into the city. They had rushed into the Red Keep, Ned parting ways with Jon Arryn. That's when he had seen her. He had only followed the screams of a woman, fearing that it was sister Lyanna. Thank the gods it wasn't Lyanna but rather Princess Elia Martell, lying in a pool of her own blood. And another girl, not too older than his sister Lyanna, was standing by the Princess' bedside holding her.
Princess Elia died in front of Ned that day, wrapped in sheets covered in blood, eyes full of tears as the fire within the chambers released the last remnants of smoke. "Visenya.", that was the only thing she word she had whispered.
The Mad King had died, little Princess Rhaenys and Prince Aegon had died, the only Targaryen, present in King's landing at the time, to survive had been her.
CATELYN STARK
She had never been prepared for the arrival of that child. Her husband Ned had returned from victory, having helped his friend Robert win the Iron Throne but he had not returned alone, he came armed with two babies, both covered in white blankets but both as starkly opposite as day and night.
Her husband's bastard, baby Jon, who was dark haired and dark-eyed and she, a child with almost silvery hair and purple eyes. Her own son, little Robb, seemed to pale in comparison to those two children. Jon looked so much like Eddard with the Northern blood in his veins and fit right into the folks and Visenya Targaryen, a child just so beautiful and a girl whose beauty would be talked of when she grew up. Then there was her Robb, the heir to the North who looked like a Southern with his Tully blue eyes and red hair. The Northern men and women were all dark-haired and dark eyed, people who followed Gods Cat had only ever read about, with their own strange customs and traditions that Cat just felt so alone and scared. The arrival of another potential heir, bastard or not, and a girl child who was obviously hated by the King were only seen as bad omens by Cat. And still people wonder why she went on to treat those two children differently.
Ned had left no room for discussion when it came to Jon. He had outright disapproved of the idea to foster the boy somewhere else. "I'm his only family, Cat. That child is my responsibility.", he had said and the matter had ended at that.
So she had used Ned's own logic and suggested sending Visenya Targaryen to Dorne, to the Martells who were her family by blood. "We cannot do that. Send her to Dorne and she will raised to be a Queen, to challenge Robert's rule, to avenge the death of her family. Dorne will rise in her support. She can't be sent there. Any other kingdom and she will be killed. Robert trusted me with that child. We are to foster her, my Lady."
And so Catelyn stood by, a mute spectator, as the two babies, Jon Snow and Visenya Targaryen, grew up with her own children in the halls of Winterfell.
ROBB STARK
In the beginning Robb had thought of Visenya to be his sister because she had always been there. Ever since Robb could remember Visenya and Jon had been in his life. It was only after Theon had come as a ward of his father, did Robb realise that Visenya was not a sister but a ward. He had heard it as whispers going around the castle but it was only after the Maester's lesson upon the Targaryen did Robb realise just how important Visenya Targaryen was. He had always been protective of her but the coming of Theon and with it the attention Theon showered on Visenya, Robb just became more and more protective.
Suffice to say, it took Robb thirteen years of his life before he realised that he was in love with Visenya Targaryen. In a whole kindgom full of raven-haired and brown-haired men and women, and the few (only his mother, him, Sansa, Bran and Rickon) red-haired people, Visenya Targaryen stands out with hair like hers. Tresses of silver that shine only and only if Visenya stands in the window of the highest tower in Winterfell such that the full moon's light falls on her. Her hair shines then and Theon jests of her having moon glow in her hair. With eyes of indigo and skin as white as snow almost, Visenya Targaryen feels like a godly human to Robb and he worships her as such. Jon looks on with pity and Theon thinks that Robb is a fool to think of her as such and worship her like a Goddess but Robb doesn't mind. Visenya is so melancholic that Robb doesn't see her smile much but she smiles when Robb lets her do what she pleases with his hair, she smiles when he sometimes sneaks out in the middle of the night to take her for a horse ride because she hasn't been taught to ride. So Robb doesn't care that the boys think he is a fool, he does whatever makes Visenya smile because she has the prettiest smile Robb has ever seen.
Robb once even asks his mother about Visenya's marriage, in the hopes that his mother will tell him that Robb shall be the groom for her, but his mother looks at him wide-eyed and tells him never to speak of this again. His mother also starts keeping Robb away from Visenya but that doesn't last for long because Robb is like a moth drawn to a flame when it comes to Visenya Targaryen.
SANSA STARK
Sansa grows up with people telling her that she is beautiful, that she is a true treasure of the North. A blue rose, a jewel of the North with a beauty that shall surpass her mother's. Sansa does find herself to be beautiful enough (atleast in comparison to Arya) but even Sansa's beauty fades in the presence of Visenya Targaryen. Sansa doesn't hate Visenya, she actually likes the girl to some extent but she is still envious of Visenya Targaryen.
Sansa is a dreamer. A girl who imagines scenes of princes and knights rescuing the fair maiden from the high tower, a story full of romance and adventure. But sometimes, just sometimes, Sansa thinks of a failed rebellion. Of the possibility of King Robert not winning, of the Targaryen rule still prevailing. Then Visenya Targaryen would have been a proper Princess, the daughter of the Crown Prince (who might have even been made King by this time). A Princess with knights lining up for her hand in marriage, with a crown on her head and songs to her name. But without all that, Sansa still thinks that Visenya is a Princess, a Princess trapped in Winterfell and so Sansa feels like the evil person here. The evil Starks who have kept Visenya Targaryen locked up in Winterfell because she is a Princess not only as a Targaryen but also as a Martell.
Sansa was a lady since she was three but Visenya's curtsies are even politer than Sansa's. Visenya makes Sansa feel like she needs to be a better lady because somehow Visenya seems to be on a level far superior than Sansa's. Jenye Poole thinks that it is all in Sansa's head but Sansa can swear upon the old Gods and the new that there is something about Visenya Targaryen that makes her so much better than Sansa. That is why Sansa is envious of Visenya.
ARYA STARK
Arya doesn't care much for Visenya, never has and never will. All Arya knows about Visenya Targaryen is that she is a ward of their father and is so lady-like. Atleast these are the things about Visenya that Arya knows on the surface. What Arya also knows is that Visenya makes Robb nervous. Which is surprising because Robb is not so shy or nervous around ladies. However the real surprise is that Visenya makes Jon smile. Jon, who excels in brooding, smiles because of Visenya. That is the sole reason Arya doesn't treat Visenya badly.
One other thing that Arya knows is that VIsenya and Jon meet up in the night a lot. What for, she doesn't know and is yet to find out but she has seen those two sneak around enough times to know that they are really close and that they are always up to something.
JON SNOW
Jon likes Visenya, always has. He likes everything about her but what he loves about her is just how easily she understands him. They had both been brought to Winterfell by Lord Stark on the same day, they have grown up with Robb, they have both been outcasts, one as a bastard and another as the child of the Targaryen bloodline. Oh, and both are strongly disliked by Lady Catelyn. So it has always been easy to bond with Visenya because she understands what Jon feels, because she is looked at the same way as Jon is. Even worse really because some people want her dead.
Visenya is quiet and shy, mindful of her place as a lady and always polite. Or so people know. But Jon knows the real Visenya Targaryen. The one who may look as cold as ice in appearance but is full of fire, the one who can stand up for her beliefs, the one who visits Jon in the night quite regularly and talks about everything and nothing at all. The Visenya Targaryen who wants to run away to Dorne but is afraid of whether she will be accepted there or not. The Visenya Targaryen who still fears that King Robert might send somebody to kill her because he wants her dead.
They had been eleven when Visenya had first shared the fear of King Robert with Jon. They had both been in her bedchambers and it was because of the innocent way in which she looked at Jon or because he had had too much to drink or something or the other that he had kissed her. He had immediately regretted it but the fact that she hadn't pushed him away was something that had only encouraged him to continue kissing her. That one kiss had turned into another which had turned into many and before you knew it, Jon had surrendered his heart to Visenya Targaryen.
They started sneaking out and every time Jon wanted them to stop, Visenya would just have to look at him with tears in her eyes and he would pull her even closer. So it hurt him when two years later Robb realised that he was in love with Visenya. A bastard of some high lord with no titles to his name or a firstborn of the same lord with the title of the heir to the North. Jon knew he couldn't compete with Robb. And so he started withdrawing away from Visenya. It didn't turn out as planned and so the relationship between them continued silently in the dead of the night.