The Haven had grown quiet.
Katsu stood near the window, arms folded, replaying his encounter with Kael.
He had met Kael before. They had spoken before. Nothing about their conversation had seemed unusual.
And yet, something had been wrong.
Not with Kael himself.
With his Heart.
"Katsu."
He turned.
Ryosen stood behind him, with Shichiro, Kentaro, Rokuro, Aegis, and the others gathered nearby.
"You said Kael's Heart reminded you of Bellerophon," Ryosen said. "Explain."
Katsu paused.
"It wasn't exactly his Heart."
Kentaro raised an eyebrow.
"That sounds like a pretty important distinction."
"It is."
Katsu approached the table.
"When I sensed Bellerophon before, his presence was unmistakable. It wasn't simply powerful. There was something distinct about it. Something I could recognize even without seeing him."
He tapped his fingers against the table.
"Kael's Heart carried something similar. But it wasn't the same presence I remember."
"Then what was it?" Shichiro asked.
Katsu looked at him.
"A trace."
Nobody spoke.
"A lingering presence," Katsu continued. "Like something had been there long enough to leave an impression, even after it was gone."
Ryosen's expression changed.
"You're saying Bellerophon was connected to Kael?"
"I'm saying I sensed evidence of a connection. I don't know what that connection is."
Aegis leaned against the wall.
"Could it be because Kael has the Heart of Absorption?"
Katsu looked toward him.
"That's what I've been thinking."
"Then perhaps he absorbed something connected to Bellerophon," Ryosen suggested.
"Perhaps."
Katsu didn't sound convinced.
Kentaro crossed his arms.
"Okay, but if Kael absorbed something from Bellerophon, wouldn't that explain the resemblance?"
"It would explain a resemblance," Katsu replied. "It wouldn't explain why the presence felt like something that should no longer exist."
Shichiro frowned.
"What do you mean?"
Katsu glanced toward the window.
"The world has forgotten Bellerophon. His name, his actions, even the people who should remember him. The River changed, and somehow, we remained unaffected."
He turned back to the others.
"But if Bellerophon's presence still exists within Kael, then something survived that change."
Rokuro tilted his head.
"So the world forgot him, but it couldn't get rid of everything he left behind?"
"That's one possibility."
"And the other?"
Katsu hesitated.
"The River didn't erase everything in the first place."
The room fell silent.
Ryosen lowered his gaze.
The words of the Blessed One returned to him.
They do not remember.
They cannot.
The river has changed.
Seek the ones who remained.
"Could the River have changed what happened," Ryosen asked, "without changing everything that resulted from it?"
Katsu considered the question.
"Possibly. But we don't know enough about the River to say that for certain."
He fell silent for a moment, staring at the floor.
Then, slowly, he spoke again.
"Actually... there's something I've been wondering."
Shichiro looked at him.
"What?"
Katsu raised his head.
"Could the River be... the universe itself?"
Nobody answered immediately.
Kentaro blinked.
"The universe?"
"Think about it," Katsu continued. "We keep talking about the River as though it's something that exists within the world. Something that flows through reality, carrying history along with it."
He paused.
"But what if we've been looking at it from the wrong perspective?"
Ryosen's eyes narrowed slightly.
"Explain."
"What if the River isn't something that changes the universe?" Katsu asked. "What if the River is the universe? Every event, every memory, every moment that has ever happened—or will happen—could be part of its flow."
He looked around the room.
"Every choice. Every consequence. Every life that has ever existed. All of it could be part of the same current."
Rokuro scratched his head.
"So when the River changes..."
"The universe changes," Katsu finished.
The room fell silent.
Shichiro looked toward the window.
"Then Bellerophon..."
"Wouldn't simply have been forgotten," Katsu said. "If my theory is correct, the reality in which Bellerophon existed could have been rewritten entirely."
Kentaro's expression grew serious.
"Then how do we still remember him?"
Katsu didn't answer immediately.
For once, he didn't have one.
"That's the problem," he finally admitted. "If the River truly is the universe, then we shouldn't be able to remember anything that the River has changed. Unless..."
"Unless what?" Aegis asked.
Katsu looked around the room.
"Unless we're somehow outside its influence."
Ryosen's expression darkened.
The words of the Blessed One returned to him.
They do not remember.
They cannot.
The river has changed.
Seek the ones who remained.
For the first time, Ryosen wondered whether the Blessed One had been warning him about something far greater than a forgotten name.
Perhaps the Haven hadn't merely survived a change in history.
Perhaps, somehow, they had survived a change in reality itself.
Shichiro looked down at his hands.
"Then what happens if the River changes again?"
Nobody answered.
Not because they didn't understand the question.
But because they understood what it could mean.
If Katsu was right, then the River wasn't merely something that could change their past.
It could change everything they knew about existence.
Their memories. Their world. Their lives.
Even the truth they were trying to uncover.
Aegis broke the silence.
"Then we need to find out."
Kentaro looked at him.
"That's your solution to everything, isn't it?"
"Would you prefer we sit here and guess?"
"...Fair enough."
For the first time since the conversation began, Katsu smiled faintly.
Then Shichiro spoke.
"What happens if Kael really does have something left behind by Bellerophon?"
Katsu's smile disappeared.
"Then we need to understand what it is before we decide what to do about it."
"And if it's dangerous?"
"Then we'll deal with that when we know what we're dealing with."
Shichiro looked down at his hands again.
He was tired of mysteries. Tired of discovering that the world was stranger than they had ever imagined.
But he knew Katsu was right.
They couldn't afford to mistake a suspicion for the truth.
Not now.
Not when the River itself had become part of the problem.
Katsu turned away from the table.
"For now, we don't confront Kael. We don't accuse him of anything. We find out whether this presence is unique to him, and whether there's any way to understand what I sensed."
"And how do you intend to do that?" Ryosen asked.
Katsu paused at the doorway.
"By finding out what the River actually changed."
He stepped outside.
The others remained silent for a moment before following him.
Far beyond the Haven, the world continued as it always had.
People went about their lives. Cities stood where they had always stood. Stories were told, histories were remembered, and names were passed from one generation to the next.
And somewhere among those stories was a name the world no longer knew.
Bellerophon.
Yet something of him remained.
Not in a memory.
Not in a story.
But in the lingering trace of a Heart that should have been forgotten.
And the River continued to flow.