Here’s an extended version of your Chapter 2, maintaining your original content while adding some more detail:

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Adrian steps out and begins walking into the desert, unsure of where he is going or where he will end up, but his emotions at that moment are too out of control to care.

As the full moon shines brightly above him, he pauses to take in his surroundings. It's around midnight. "How long have I been walking?" Adrian whispers to himself, his voice barely a murmur against the stillness of the night. After waiting a few moments, he lies down to sleep, surrendering to exhaustion. As he closes his eyes, he realizes the severity of his situation: he is alone. He has left his allies behind, and he no longer has a family or a place to call home. His heart is heavy with grief, anger, and sorrow. He curls up tightly, and tears begin to flow freely. The release feels momentary until his mind finally succumbs to sleep.

He wakes up early the next morning. The sun is out, casting golden rays across the desert landscape. With no other options, he resumes walking, letting instinct guide him. After several hours of wandering, he comes across a city. It’s clear that it has been abandoned for a long time, as nature has reclaimed the area. Trees and various plant life have intertwined with the buildings, city streets, and other remnants of urban life.

Adrian enters the city but treads carefully, the weight of the world on his shoulders. He takes out a small knife from the equipment that the saviors gave him. However, he quickly realizes that he is not skilled at wielding a blade; the thought gnaws at him. He also knows he has yet to figure out how to use his powers effectively. With a resigned sigh, he tells himself that there is nothing he can do about it now and continues to explore.

As he navigates the dilapidated streets, Adrian encounters multiple demons. Though they are not very strong, he hides and maneuvers around without getting caught, aided by his small frame. As the sun begins to set, he seeks refuge on a high floor of a tall building to sleep. Before he succumbs to slumber, he gazes down at the city. The streets are teeming with movement; from this height, the people below look like ants scurrying about. However, as he squints to see them better, he realizes that those people aren’t really people at all.

Adrian wonders what life was like back then, before the invasion. It happened so long ago that his parents don’t even know. Two hundred years ago, two days after it was announced that the human population had reached seven billion, the world changed forever. "I've only seen things like the ocean in books and stories," Adrian thinks. "People had different beliefs and all that. It was the norm to travel halfway around the world in a few hours, to meet new and exciting people. I wonder what it was like," he muses as his eyes gradually shut.

Clink, clank, clink. Adrian wakes with a start. It’s dark, and his vision is still blurry. He looks toward the source of the sound and sees two dim red dots in the distance. "What is that? What is that?" Adrian asks himself, a knot of fear forming in his stomach. As the reality of the situation dawns on him, his heart races. The demon approaches with a low, menacing growl, drawing nearer and nearer. In the oppressive darkness, he can’t discern its true form.

Suddenly, the creature steps into the moonlight, and all Adrian sees is a shadow. Its hair doesn’t reflect any light, giving it a two-dimensional appearance, as if it lacks texture altogether.

Adrian pulls out his small knife, preparing to fight for his life. His heart races, and sweat beads on his forehead as he begins breathing deeply, trying to steady himself.

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The demon lunges at him, and he instinctively raises his arm to protect himself. It bites down hard, and an unbearable pain shoots through Adrian's arm. He fights the urge to scream, knowing he must stay silent. With adrenaline coursing through his veins, he throws himself down on top of the demon and starts stabbing at its head. Despite his weak strength, the adrenaline keeps him persistent. He stabs and stabs and stabs, again and again, but the demon doesn’t relent.

It releases its grip on Adrian's arm and steps back. He glances down to see a pool of blood surrounding him, most of which is his own. Panic begins to set in as he starts to feel dizzy and lightheaded. His body turns cold, but the looming threat of the demon quickly brings his focus back to the fight. The demon attacks again, but this time Adrian's reactions are sluggish; he raises his blade, but his strikes feel much weaker.

"Damn it!" Adrian thinks to himself in frustration.

As the demon prepares to bite his arm once more, a sinking realization hits him: this might be the end. In desperation, he throws himself on top of the demon again, pressing his knife against its throat. With all his weight, he pushes down on the knife with his shoulder, forcing the blade deeper into the demon's flesh.

The demon's skin begins to give way, and as the blade cuts deeper, the creature bites harder. Pain radiates through Adrian's body, worsening with each passing moment. "It hurts, it hurts," he thinks, tears brimming in his eyes, but he fights through the agony until…

Adrian wakes several days later next to a campfire, sunlight pouring onto his face. He attempts to sit up, but a sharp pain shoots through his entire body. "Hey guys, he's finally awake!" a familiar voice calls. As his vision clears, he sees the other saviors surrounding him.

"What? He actually survived?" Guy exclaims in disbelief. "What’s going on?" Adrian croaks, his voice raspy and weak.

"We came looking for you, obviously. It was hard since we figured you would only go straight, you know, since you didn’t know where you were going," one of them explains.

Adrian pauses, looking down at his body. A gruesome sight catches his gaze: his arm is deformed and purple, with dark outlines snaking through some of his veins. His eyes widen in horror, and he fights the urge to vomit.

"Don’t worry about it; it’ll be fine. The fact that you’re still alive proves that," the girl assures him. She takes a breath before continuing, "But you shouldn’t have left on your own. You didn’t know where you were going, you were unarmed, and you don’t know how to fight. What were you thinking?"

She sighs, her frustration evident. "Listen, I know you’ve been through a lot, but you’re not the only one who’s faced hardship. Your selfish decisions impact other people besides yourself. No matter how riled up your emotions get, just remember that all this is bigger than you. You’re not special, so start thinking with your brain from now on. Get some rest." With that, she walks away, visibly upset.

"Damn, she's pissed," Kamano comments, shaking his head.

Adrian sinks back into unconsciousness, slipping into sleep once more. When he awakens several hours later, it’s nighttime again. The pain is almost completely gone, and the deformation in his arm has diminished; most of the purpleness has faded.

"Awake again!" Guy exclaims, noticing him. "How are you feeling?"

"Fine, mostly," Adrian replies, relief flooding through him.

"Good! We can't have you dying so quickly. First thing tomorrow, we resume training."

A few moments of silence pass, and then Adrian sighs. "Hey Guy, have you ever heard voices?" he asks tentatively.

"What?" Guy responds, puzzled.

"I mean, a choppy girl’s voice. I don’t know how else to explain it," Adrian clarifies.

"Ah! I know what you’re talking about—the assistant. That’s what we call her," Guy explains, his face lighting up with recognition.

"The assistant?" Adrian echoes, intrigued.

"Yep. She saves our lives, lets us break through our limits, and helps us kill demons. We assume it’s a part of being a savior. The only problem is that she is incredibly unreliable and inconsistent. But when she does help you, it’s always a blessing," Guy explains.

"You can say that again," Kamano adds, chuckling.

"Ha! You were awake this whole time," Guy exclaims, a grin spreading across his face.

"Welp, it’s hard to sleep with all this noise," Kamano replies, rolling his eyes.

A few moments of silence pass by, and then Adrian speaks up. "Hey guys, what were your lives like? Before becoming saviors, I mean."

"Mhh, I’d rather not say," Guy answers, his tone growing serious.

"Me neither. It brings back too many memories," Kamano adds quietly.

"I see… Well, I like to think my life was pretty good. It was peaceful, and I was happy. All this—" Adrian gestures vaguely around him—"it’s just a lot, you know? I had people I loved and people who loved me, but now…" His voice trails off, a sadness settling over him.

"Tell me something," Kamano interjects, "what do you want the most in the world right now?"

"I... I want revenge on the person who killed my family," Adrian admits, his voice steady but heavy with emotion.

"Okay then, do it," Kamano replies, surprising Adrian. "We never said you shouldn’t. Your duty as a savior is to kill demons. No rule says you can

The long night passes and Adrian starts pushing himself day after day training and pushing his limits, every single day, until those days turn into weeks and weeks turn into months until those months turn into a year