Kevin, knowing that the situation had turned difficult, immediately retreated from there.
In the first place, he knows that facing Eren would not be easy.
As there are many unknowns surrounding him.
First and most importantly, the Founder's Titan, even though Eren doesn't have the royal blood in him and Kevin had already removed Historia from there, the variable through which Eren can access the Founder's Titan.
Still, who can say with certainty that Ymir will not favor Eren, as she had done in the canon?
Then came the Attack Titan, with the ability to foresee the memories of its future inheritor.
That is the area where even Kevin is completely blind; in the case of the Founder's Titan, at least he knows that Eren doesn't have access to its power, if there is no 'if.'
But in the case of the Attack Titan ability—knowing the future—it completely puts Kevin in the blind.
After all, he who in the present has the knowledge of the future holds the power in his hand.
And that also proves Kevin right in his cautiousness.
The abrupt action of Eren to devour Bertholdt clearly shows that Eren, to a certain degree, has the memories of the future, and as for how much, no one knows except him.
Making it the prime reason why Kevin didn't hesitate and instantly retreated.
After all, fighting against Eren, who has the Colossal Titan and future knowledge, is completely illogical.
That's why, to gain an advantage over Eren and to gauge his power limits, Kevin had already searched for Mikasa and, upon finding her, taken her in his hold.
Anyone who knows Eren knows that Armin and Mikasa are the reverse scale of his—the people he cherishes the most in his life.
That's why, with Mikasa in his hand, Kevin at least feels that he has some control over the situation.
And retreated successfully, acting on his next plan, to face Eren.
.....
With the sudden disappearance of Kevin, Eren's eyes fell on the Armored and Female Titans; the menacing look in his eyes sent shivers down their spines.
Reiner and Annie stood completely petrified; the turns of the event left them completely stunned, unable to react for a while.
It was only when Eren arrived in front of them that they woke up from their stupor.
Looking at Eren, anger boils inside Reiner; the loss of his friend almost breaks his spirit.
Letting out a roar of grief, anger, and much more, Reiner lunges at Eren.
"I will kill you. How can you take Bertholdt away from us?"
Annie sees the madness in Reiner's eyes and also feels the sadness, but the current situation doesn't even allow her to remember anything related to Bertholdt as she looks at the clash of Eren and Reiner.
This time, surprisingly, Eren gains the upper hand in just a few moves.
The broken and dissipated body of the Armored Titan releases heavy smoke.
Reiner, inside the nape of the titan, looks at Eren with hatred; the image of Bertholdt being devoured by Eren flashes in his mind. 'No, not once again; I can't let that repeat again.'
Like a broken machine Reiner repeats the same thoughts inside his mind; with a single goal in his eyes, he wants to rip apart Eren's stomach and retrieve Bertholdt from there.
But the situation changes completely; instead of him taking out Eren, he gets completely suppressed by Eren.
Annie looks in shock at the Attack Titan, who, within a few moves, takes down Reiner.
'Idiot, we should run away from here.' Annie thinks, knowing that they have completely lost and staying here any longer is going to cost them their lives. Just then—
Roar
With a violent roar, Eren rips apart one arm of Reiner and immediately grabs his nape.
Startled, Annie tries to reach Reiner to help, but before she could even take a step.
Ripppp
Blood gushes out of the armored titan's nape; the flesh, which was strongly armored, gets torn apart like paper.
In the blood and smoke, Reiner's figure became visible.
Instantly, the hand of the Attack Titan reaches toward him and rips him apart from the Titan's body.
Reiner's eyes roll back in pain.
Knowing what had happened, he even tries to trigger the transformation again, but having already consumed his lot of stamina, the transformation fails.
Feeling helpless, despair reaches his eyes; looking at the open maw of the destruction, Reiner now regrets his action.
Crunch
Annie looks at the broken pieces of Reiner's body and feels the chill.
Instantly, without wasting any time, she ejected from her titan's nape and, using the ODM gear, quickly fled from there.
'Everything is over; we have failed.' Despair and gloom appear in Annie's mind: 'I can't do anything; I have to return to Marley, otherwise I will also be finished.'
The thought of running away from Paradise Island firmly takes root in her mind.
But the next second a shadow flashed by her side.
Looking at Eren, who has left his Titan form and similarly using the ODM gear quickly arrives by her side, despair and fear started beating in her chest.
Thump
Before she could even process anything.
The hand of Eren clamped her lower jaw, like hooks piercing the fish mouth; Eren's fingers clawed the inside of her mouth.
No words escape her, as the coldness of Eren's gaze freezes her mind.
Pleading tears started to gush out of her eyes.
But like a merciless fisherman, Eren didn't care about her.
.....
Rumble
A flash of lightning appears. Armin, who was looking at the decomposing figure of the Attack Titan, searching for Eren, immediately gets attracted by this familiar sound.
Looking in the direction from where the golden light shines, Armin instantly uses his ODM gear.
Landing on the roof of a building, Armin's eyes fell on the figure of Eren as he came out of the titan's nape.
Swiss
"Eren, are you alright?" Reaching Eren's side, Armin instantly burst out with question after question: "What is happening, Eren? Who was that strange titan? Do you know him? And what happened to Mikasa? She is safe, right? Eren?"
The voice of Armin completely dies down towards the end.
A single drop of tears fell; looking at the hollow eyes of Eren, Armin immediately broke up, and a feeling of pain started to rise inside his heart.
"Eren." His voice turned choked as his throat drowned in pain. "Why aren't you saying anything?"
Eren continues his silence.
"Why aren't you sharing anything?"
"Eren, why are you suffering through this alone?"
"Don't you remember our promise?"
"We are going to face everything—together."
Saying that, streams of tears started to flow out of Armin's eyes.
"Armin."
The cold voice of Eren sounds in Armin's ear.
"Hmm."
Armin looks up at Eren, who suddenly hugs him, feeling the coldness and heaviness in him; more tears run down Armin's face.
Silence followed for a few seconds; Armin tries to take the torment from Eren, ready to help his friend as he can.
"Take care, Armin."
The next second, Eren breaks free from Armin's hold, who tries to catch him, but the broken and tired body of Armin doesn't have the strength to stop him.
"Eren!!" Armin roars out in pain, looking at Eren, who turns his back and starts to move away from there.
Armin gives chase, but suddenly darkness starts to consume his vision; the figure of Eren becomes blurry, and then with a thud, he falls down.
Eren, who was moving ahead, gives a glance back, looking at the unconscious Armin; he then looks behind at a specific building.
Finding Ian Dietrich there, Eren continues and, using the ODM gear, quickly rises in the air; traversing through the crumbled houses and destroyed buildings, he crosses the broken hole in the Trost district.
The horizon arrives in his vision, with the flashes of memories of the ever-changing future.