The distance between where Ryan was and the area where the attack was happening is about 40 km. Ryan converted his boots to boosters like 'Iron Man' suit and went quickly to the area where Chitauri army was attacking.
It took Ryan about 5 minutes to reach there. But Ryan was very shocked to see the destruction within that 5 minutes time. Ryan had seen the destruction in movie but that didn't even come close to the real incidents.
Ryan is a good man but is not a saint. He could have saved people during 'Hulk vs Abomination' fight or 'Thor vs Destroyer' fight, but without proper power, these things were meaningless.
When Ryan reached the area, he saw that the Chitauri army have yet to send the Leviathans(The big Monster that was punched by Hulk in Avengers).
After reaching there, Ryan converted his boots back like in the Demon Slayers Uniform. After that he saw few Chitauris with gun like things and were shooting at random people.
Ryan didn't waste time and just dashed towards them and cut them in half.(This is the benefit of Breath of the Sun as it is faster than Breath of Thunder, powerful than Breath of Stone and sharper attacks than Breath of Wind, all in all its the best one could get. And with Ryan practicing them for years it has become very deadly).
After that Ryan just ran in the direction from where the Chitauris were coming while cutting down every one of them. After few moments, Ryan found the police who set up road blocks and tried to shoot down the flying Chitauris.
"Who are you? Get back, it's dangerous", shouted one policeman when he saw Ryan coming in their direction.
"Oh, I am just cutting down some pests", said Ryan casually. Ryan's casual tone angered the policiman but before he could do anything, he saw a large group of Flying Chitauris coming their way.
Ryan jumped towards the Flying Chitauris ignoring the shouts of the policemen. Ryan thought in his mind, "Breath of the Sun: 11th Form- Shining Ray of Grace" and performed his attack while in mid-air.
"Boom" "Boom"...
About 11 to 12 Chitauris were destroyed in an instant leaving only a few. Ryan then used the boosters on his boot to propel him towards them and cut them down easily. After that Ryan went ahead leaving the shocked policemen.
"Sir, what was that", asked a newly appointed policeman.
"I don't know and with many crazy things happening, I don't know anything anymore. But one thing is sure that he is on our side. And this is the only thing that matters", said Police Captain.
After that Ryan went towards the area with maximum number of Chitauris, the place where Avengers were fighting. Before even reaching that area, Ryan heard a loud roar. When he looked above he saw a Leviathan coming from the portal.
Ryan just looked at it for a few moments before continuing with his alien hunt as Tony Stark has grabbed his attention. After running for half a kilometre, Ryan saw two of the Avengers, Hawkeye and Black Widow.
"She is too sexy", muttered Ryan.
"Yes Sir, she has one of the most appealing figure in the World", said Erica.
"Okay let's go and help them", said Ryan.
After that Ryan just dashed in their direction killing every Chitauris like cutting grass.
"Need some help", said Ryan coming from behind Natasha and Clint.
Natasha(Black Widow) and Clint (Hawkeye) aimed the gun and Bow at Ryan who suddenly appeared behind them. They were shocked to see somebody coming behind them without them noticing anything.
"Hey hey, I am here to help. No need to be so violent", said Ryan with a smile. It was then Natasha and Clint saw the dead Chitauris behind Ryan. They were again shocked to see not a single Chitauri alive in the lane from where Ryan came.
"Who are you?", said Clint lowering his bow but vigilance still in his eyes.
"You are Ray Coleman, The Genius. What are you doing here and why are you here", said Natasha with a surprise in her tone.
"Oh I am here to help. I mean if Stark can fight, then it's not too difficult for me to fight. By the way you look very very sexy", said Ryan.
"Thank you. What's with this outfit", asked Natasha with a slight blush.
"Oh this, I thought I would look cool. Okay let's talk later. I mean these guys are coming", said Ryan.
After that Natasha, Clint and Ryan got in position to fight the Chitauris. Clint just shoot them with his arrows while Natasha shoot them with her gun. And Ryan was just jumping and cutting them down using his Breath of the Sun technique.
Natasha and Clint were visibly surprised seeing Ryan's powers. They thought he would be like Tony who uses a big suit or will use some weapon to shoot them down. But Ryan only used a sword and the power and speed Ryan showed completely surprised them.
After a few minutes of fight, Steve Rogers(aka Captain America) came. He was as shocked as Natasha and Clint. He asked Natasha about it.
"Who is he? How come a civilian is here", asked Steve
"You see, he is Ryan Coleman, a genius like Tony and Banner. He is here to help and he can fight too", said Ryan.
"Hello, nice to meet you Mr Captain America. I am Ryan", said Ryan.
"Nice to meet you kid. But don't overdo if you can't fight. I am Steve by the way", said Steve. After that they began fighting or more like Monster Hunting for Ryan.
Just then, the sky turned dark and Thor came along with thunder electrocuting many Chitauris.
"What's the story upstairs", asked Steve.
"Power surrounding the cube is impenetrable. By the way who is this kid", said Thor.
"Yeah Thor is right. The barrier is made up of pure energy. We have to deal with these guys. And who is the kid, Thor talked about", said Tony in the Coms.
After that Natasha explained them about Ryan.
"Whoa kid, join my company. We will revolutionize the whole world", said Tony.
"Wow, a recommendation from Tony Stark. But no, I enjoy working alone", said Ryan.(Ryan also got a com. piece from Natasha).
"If you guys are done with all this. Can you please focus", said Steve.
"Yes, But how do we do it", asked Natasha.
"We do it as a team", said Steve.
"But leave Loki to me. I have some unfinished business with him", said Thor.
"Oh yeah, then get on the line", said Clint. Steve was about to say something when Banner came riding a bike.
After that Natasha and Banner talked with each other and compared the scene with Hulk's destruction. After that Banner noticed Ryan and asked about it. Steve quickly explained about Ryan. Banner was surprised to see such a genius here, so he greeted Ryan.
While they were talking Tony said, "Oh Banner have arrived. Then tell him to suit on. I am bringing the party". Then he lured Leviathan to where the Avengers and Ryan were.
"I don't understand what kind of party is this", said Natasha.
Captain then said Banner to get into Hulk form. Ryan who was standing there jumped to the front and said, "Let me deal with it".
Steve was about to say something but seeing Ryan's serious face, he didn't say anything and he has seen somewhat of Ryan's powers.
Ryan's left leg moved back while his right leg moved forward. Ryan bend forward and breathed deeply.
"sssssshhhhhhhhh"
Hissing sound came which surprised the Avengers. Ryan who was in position muttered, "Breath of the Sun: 17th Form- Thunder-fire Slash".
After that Ryan flashed and went passed the Leviathan. When the Avengers came to senses, they saw Ryan has passed the Leviathan and the Leviathan was cut into half horizontally.
Every Avengers were shocked by Ryan's strength and speed.