After he ledt the city he went to the Lao Gai lake. He didn't have the seismic sense of Toph and couldn't feelthe location with earthbending but his developed water sense could pick up the hidden tunnels.
A bit of earthbending later he stood in front of the entrance to the Dai Li headquaters.
He entered the structure carefully and walked down into the maze of tunnels.
After only a couple of steps Dai Li agents spotted him and shot their earth palms at him.
He swiftly doged and shot several blasts of fire at the the two Dai Li agents.
Unfortunateley they were able to doge and charged at him while riding an earth wave.
One of them tried to punch him but Akira just smiled and moved swiftly and punched him in the gut making the guy grasp for air.
With a kick to the guy's head he knocked him out without him being able to defend himself.
"Unfortunateley for you I only need one of you guys" Akira said and bloodbended the second agent to freeze and lose consciousness.
He then killed the second Dai Li agent , careful not to leave any blood on the uniform or the floor and stripped the guard off his Dai Li uniform.
After he had changed he burried the guard in the earth and tied the knocked out guard up with ropes.
He then splashed water into the face of the captured guard.
"Here is how this will go. You will lead me to the prision of Long Feng without making a fuss or you I will kill you in the most painful way imaginable. Even if you had your colleagues you would still lose to me is that clear?" Akira asked threatingly.
The guard just nodded and Akira took of the gag to prevent the guard from screaming and the ropes tying him down all while glaring at him warningly.
"Come with me" the guard said and walked through the endless maze of tunnels.
After a while they stood in front of a prision and the guard opened it with the keys of the guard who was guarding the door.
Then Akira was pushed inside and the prision door was closed behind him.
The problem? The prision cell was empty.
He laughed madly "well played,well played" he said while clapping "that would have worked on anyone else but not me"
With that he bloodbended the guard to reopen his prision cell all while the guard was shitting himself in fear.
"Now I'll ask again. Where is Long Feng you bastard" he asked angered.
"...come w...with me" the guard said in fear and led him to another cell in the prision where Akira could see Long Feng.
The door was opened and Long Feng looked at him.
"Hello there" he said and shot an overcharged lightning bolt at Long Feng killing him instantly.
He then took off his helmet and turned to the other Dai Li agents.
"Two choices. Surrender or die" Akira said and the agents all bowed to him when they saw Ling Fengs corpse.
"Good, from now on you will answer to me" Akira said in a commanding voice.
"In a while three young Kyoshi warriors will show up. Imprison them and inform me where they are and also tell the rest of the Dai Li agents that there has been a change in leadership and if they don't want to face my wrath they should follow"
"Excuse me but who are you?" one of the guards asked him.
"I am Akira, prince of the fire nation" he said and smiled "and you will help me take back my throne as king of the fire nation"
...
He delivered the secret files of the Dai Li about team Avatar to them including Tophs letter.
He teached her metalbending so it wasn't an issue and she would come back after beating them up.
With the new information from the letters they decided to split up with Sokka and Katara moving to the water nation troops of their father and Toph went to search for her mother.
Aang went to the eastern air temple to master the avatar state and Akira stayed in the palace to support the earth king with the proper arrangements.
A day after team Avatar split up he got the message from one of the Dai Li agents that the three Kyoshi warriors were captured and currently in a prision cell under the Laogai lake.
He smiled. If he can trap Azula for the rest of the war it would bring him an immense advantage.
The prision door opened in front of him revealing Azula sitting on top of the bed while having her feet and hands bound.
"I apologize for the inconvinience cousin" he said sarcastically "i already predicted you would do something like this so here is the deal. You will stay here until the war is over, after that I will let you go. It is your choice if you want to seek revenge or embrace the new peace that we will have"
"You fucking asshole, you will regret imprisioning me" Azula said dangerously but Akira just laughed.
"Please Azula did you really think you stand a chance against me? You may be dangerous to the young Avatar but not for me. When I let you out of here it's your choice if you want to die or finally lead a peaceful life as princess of the fire nation" Akira said and went out to talk with Mai and Ty Lee.
The next prision door opened revealing Mai and Ty Lee both being held in the same cell.
"Who are you? Why did you capture us?" Ty Lee asked.
"I am Akira the cousin of Zuko and Azula and I captured you to get Azula out of the war, she needs a break" he said and sat down on a chair "I have an offer for you and Ty Lee..."
They agreed to join the invasion way more easily than expected, it seems like Azulas rule of terror and fear even in her friendships helped him now.
"Say Akira, do you have a girlfriend?" Ty Lee asked.
"No I don't" he said.
"Wow really? I thought someone as cute as you would be really popular with the girls" Ty Lee said.
"Well mabye I am just to dumb to pick up the signals or anithing..." Akira lied.
"Uargh...I am going to puke" Mai said and left them alone.
"How about you? Someone as attractive as you with such a bubbly personality will also get you a lot of admirers" Akira teased.
"Oh well I never thought about it that way but now that you mention it I guess you're right" she said and Akira smiled.
Hey don't blame him Katara is way to bossy for him but Ty Lee is cute in her own way and makes one feel relaxed.
"Quite funny, you've been chasing us this whole time and now you are here helping me invade the fire nation" Akira said.
"Funny how the things go sometimes isn't it?" Ty Lee said and leaned into him.
"So if you don't have a girlfriend, what about me?" she asked.
"I wouldn't mind" he said smiling and looked into her deep brown eyes that stared back into his own.
She then closed her eyes and leaned in, kissing him on the lips and hugging him with her breasts pressed to his chest.
"Get a room you two" Mai said from the side in disgust.