To create Honkai Impact 3rd in a world where Kallen exists.

Wilvi also said helplessly,

She'd seen the Law of Reason Core Kevin handed her before, so all she could say was... best of luck and goodbye...

"That's true. With the two of us here, we don't need it to cause any trouble."

Möbius nodded, turning the page on the matter and ceasing to think about the other party's existence; it was good to have one less troublesome person around.

...

The scene that followed was another one where Otto's past memories surfaced, and the view returned to an ancient art style.

The verdant mountains were dotted with crumbling walls and ruins. Two people in the suburbs were talking anxiously.

Otto and Karen have grown up and their figures are now similar to those of the characters who come after them. The young boy and girl have begun their own life journeys.

But clearly, their thinking was still shrouded in mystery, as evidenced by their current situation regarding the Eastern Expedition.

The timing happened to be some time before the Mandate of Heaven's Eastern Expedition.

"...Huh? You've never been on a battlefield before, are you sure this is okay?"

Karen hesitated, looking at her friend in front of her. Her friend's health was really not good. What if something unexpected happened on the battlefield?

She was naturally worried.

Otto, however, maintained a calm smile and chose to offer advice in Kallen's manner.

He wanted to go on a military expedition as an intern medic, hoping it would help Karen.

Seeing the lingering hesitation on Karen's face, he spoke again, his voice filled with sincerity and earnestness.

"Do you remember? When we first met as children, you said to me—"

"When we grow up, you have to take me with you to save the world."

Karen still frowned, not because of Otto's desire to join the army. Compared to Otto's eagerness to follow Karen, Karen was now more concerned about the necessity of the Eastern Expedition...

She did not believe that war was ultimately an effective means of saving the world.

"You know, the threat of collapse has been rising one after another in recent years; thanks to the ability of Destiny to penetrate into the governance of various countries, disasters like the Black Death have been brought under control in time."

"However... our deep involvement in matters we shouldn't have been involved in has caused Schicksal to become 'distracted' as an organization."

“Your father used to care a lot about the suffering of the people and would personally check whether the disaster relief supplies sent to various places each year were appropriate.”

The more she spoke, the more helpless and confused she became.

Her inner beliefs were sharply divided from reality; she struggled to understand, yet remained confused.

I don't understand so many things... Why the Eastern Expedition? Why didn't they think of helping the people after the disaster? Why did the kind people turn into that?

"But what about now? His desk is filled with court secrets from all over the country, and the time he spends meeting with spies every day is taking up the time you and your son can communicate."

"These are all wrong, abnormal, aren't they?"

Karen looked hopefully at Otto, hoping to get a positive answer from him.

She was thinking about the problems in society, from all the perspectives she could see, but she didn't know what was right or wrong, or rather... at that time she still needed the affirmation of her companions.

But then… Otto lowered his head, avoiding Kallen's gaze, and whispered,

"I...I don't know."

"My only wish is to support you as much as possible. I... haven't thought too much about that."

At this moment, Otto hesitated. He felt he had done something wrong, but he couldn't face reality yet.

He believed in Karen, believed she could do anything, and he... only needed to follow her, like a moth drawn to a flame.

After all, the other party was so upright, and in his eyes, they were omnipotent.

"..."

Karen's eyes dimmed, and she pursed her lips, feeling even more lost.

“Otto… I’m not confident of winning this battle. I just want to bring you… and those warriors back safely.”

"You can do it, Karen, I believe in you."

Otto's encouraging voice came, but he misjudged the other person's emotions.

He assumed the other person was just nervous before the battle and needed encouragement, but he downplayed the real issue and ignored the crucial facts.

...

Unusually, the voice of the Void Treasury carried a hint of emotion—a mixture of mockery, curiosity, and hope.

"...She was seeking deep spiritual help from you, but you gave her irrelevant answers."

It could accurately discern the other person's simple expression.

"Indeed. As expected of the Key to Revelation, your answer is quite accurate."

Otto spoke words of approval, his calm eyes revealing a hint of helplessness.

"Treating the other person as a superman, or even a perfect person... this factor can be quite fatal emotionally."

"Look, I'm not a qualified childhood sweetheart, right?"