As Barthogan was killing Areys and the pyromancers in the Red Keep, the Rebel army at the Trident were confused one of their leader Robert Baratheon who had been fighting the Prince is in the medical tent unconscious after his battle with an unknown large knight wielding greatsword.
But they didn't flatter in their confusion, along with their another one of their leaders led the army to King's Landing after getting the information of someone killing the Mad King and placing his head at the entrance of the Red Keep, kidnapping the Prince from the battlefield. Along with the rebel army, the Royalist army was also marching towards the King's Landing to find out the reason of their King and kidnapping of their Prince.
When they reached the King's Gate of King's Landing, they saw three knights, wearing pitch black full body armor guarding the Gate. The female knight who was wielding a spear spoke loudly enough for all the forces to hear "My Liege has commanded that the highest commanding officer and another person can enter the King's Landing. Failure to comply will be met with force."
"Who is your liege? Is he the one who killed the King?" One man wearing a white cloak asked from the Royalist army.
"Lord Stark. And yes, our liege killed the King." The woman replied to the questions.
When they heard Lord Stark, everyone in the Rebel army and Royalist army looked at a young man for answers, who in turn just said "I am surprised as you guys are."
One of the men of the Royalist army asked the man who questioned the women "Ser Barristan Selmy, should we fight?"
"A women with spear and two men standing behind her with war hammer and a great sword, I would say we would have a chance normally, but even if Ser Jonothor Darry were alive and we three King's Guard attacked together, we would lose." Pausing there the man with white cloak said to Barristan Selmy "Ser Barristan Selmy, let's do as she says. Her Liege have the Royal family under his custody, we should not do anything that would jeopardize their safety."
Nodding at the words of the man, Barristan said "You're right, Prince Lewyn Martell. Our priority right now is the safety of the Royal family."
While the Royalist's were coming to a conclusion, Robert Baratheon woke up from his unconscious state and heard everything that had took place after he fell unconscious. After hearing all of it, Robert said "If that women standing at the gate is anywhere near as strong as the one I fought, then it's better to do what they want. And they said that their Liege is Lord Stark right? Don't you want to know who have the guts to pretend as the Lord of Winterfell, Ned."
"Aye." Ned, the one who everyone looked at when the female knight uttered the words Lord Stark, agreed with Robert, he too wanted to know who this Lord Stark is, 'Is it him? But, haven't heard from him over five years.'
Similar incidents took place at the different gates with different armies, some tried to use force but retreated as soon as they were beaten black and blue by ten or less knights. After ten minutes of struggle, the armies that marched to King's Landing after they heard about the death of the king and kidnapping of the Prince, obeyed the demands of the Lord Stark who have taken over the entire King's Landing.
While the armies were deciding upon whom to send with their highest commanding officer, inside the Throne Room, Barthogan sprung up from the steps of the Iron Throne as he heard Bertha contact him 'My Liege, we have incapacitated the one's who are guarding the Tower and found your sister. She's pregnant, my Liege and she may go into delivery anytime soon.'
Pacing around the Throne Room, Bart asked Bertha 'Bertha, is there any safe way to bring her to me?'
'We can teleport your sister to your side through the shadow gate my liege.' Berth gave him an answer just as he asked.
Hearing what she said, Bart stopped his pacing and asked wide eyed 'What do you mean by shadow gate? Can you guys create teleportation gates!!'
'All the Knights can open a gate in their cloaks if they extend it and we are the teleportation point for my liege. People could travel through it if your permission is given.' Bertha said.
Closing eyes and pinching his nose, Barthogan thought to himself 'How may more power's are behind these shadow knights? Will something pop up in the future?'
Shaking his head, Barthogan said 'Open a gate for me when I say, I'll be coming there instead.'
'As your command.' Bertha said.
"Knight, guard the throne room and Jaime Lannister." After ordering the knight who was tending to Rhaegar, Barthogan started to drag Rhaegar by his hair to where Elia and her children were.
Jaime on the other hand not knowing what was happening tried to pry some information from the Knight that Barthogan had left behind, but he was unsuccessful in his endevour.
*Slap*
Before knocking on the door, Barthogan slapped Rhaegar awake, and looking straight in his eyes, Barthogan said "You will stay with your wife for now, and when I call for you, you will come with your whole family, that include your pregnant mother, your little brother, your wife Elia and your children. No questions asked. If you don't comply then, my Knights will drag you to the throne room."
Rhaegar for his part only nodded at Barthogan as he was exuding an aura of death as he was warning Rhaegar. Nodding at him, Barthogan signaled his Knights to open the door and entered the room.
"Elia, I have brought your wayward husband. And for your information, I have beaten him up quiet a bit for the things he started. Now, if you will excuse me, I have to meet with someone important." Without even giving a chance for Elia to say anything, Barthogan went away from the room to a secluded area and willed to teleport himself to where Bertha is staying.
The next second, Barthogan disappeared from the Red Keep as a shadow swallowed him up and appeared at the top floor of the Tower of Joy where his sister was sleeping soundly on a bed, surrounded by his shadow knights.
Approaching her, he cupped her face with one hand and called out "Lya... wake up."
"Mmmm.... Five more minutes Bart." She grumbled out as she heard his voice close to her. In the next moment, she opened her eyes abruptly and looked at the sound source and asked with a crack in her voice "Is this a dream?"
Kissing her on her forehead, Bart said "It's not a dream, I am here."
"Bart!" Shouting out his name she tried to hug him, but she felt pain from her stomach and she gave out a bitter smile as she continued "You came back from your exile only for you to see me like this. If father or Brandon saw me now, they may go crazy."
Creasing her head, Bart said "I have met Rhaegar, he told me that you two were in love and that you two married."
"Shhhh." Breathing out, she gave him a sheepish smile and said "We were in love until we married. After that he started to tell something about the promised prince and a song of ice and fire, and all."
Squinting his eyes, he asked "So you don't love him now?"
"I do love him, it's just that I think he is turning delusional." Lyanna said as she scrunched up her nose.
"Why do you say so?" Bart asked as he wanted to know what his siter thought of the Prince.
"He's been mumbling about children of the forest, giants, and others. It was as if he was have a dream. And one day he said that our child will be the prince who was promised, and that the song of ice and fire will be his. He also told be that he has been getting visions of three eyed crow flying beyond the Wall" Lyanna told her brother the important things she could think of.
'It seems, he found out about the prophecy from somewhere as the Targaryen's has forgotten about it after the Dance of the Dragons, and only Stark's remembered it. I know it because, Brandon and I switch places whenever father called him for classes. And this three eyed crow that is beyond the wall, it seems some has been controlling Rhaegar through visions from beyond the Wall.' Shaking his head, Barthogan asked "Then, why didn't you write a letter to father or Brandon?"
"I did write. I used the ravens to sent it to them. Didn't they get it?" Lyanna asked with a bit of trepidation.
"They didn't. And because of that, Brandon went to King's Landing to and father followed him." Bathogan stopped at that as Lyanna started to shed tears and started to cry her eyes out.
"*SOB* Please tell....me they are alright.*SOB* Please Bart...." Lyanna requested him to say those words, but he didn't, instead he calmed her down as much as he can into sleep and told Bertha "I don't know if you have any experience in delivering a baby, if you do then help her out."
"You don't have to worry about her my Liege, she will be in my care. I'll make sure that no harm will come upon her or her child." Bertha reassured him.
Nodding his head, Bart said "Thank you. Now sent me and those three white cloaks to King's Landing. There thing's to be done a war to end and decision to make."