The Student Council office was silent.

  Sona Sitri reviewed a set of magical documents, though her eyes weren’t truly focused on them. There was the faintest crease between her brows—not worry, but active calculation. The expression she wore when a variable kept reappearing in an equation without fitting cleanly into any category.

  A soft knock at the door.

  “Come in,” she said without looking up.

  The door opened with a whisper of energy.

  Crimson hair. Noble aura. Blue eyes that were never as calm as they appeared.

  Rias Gremory.

  “Good afternoon, Sona,” she greeted with a slight inclination of her head. “I didn’t expect you to still be working.”

  “This isn’t work,” Sona said, setting down her pen. “It’s damage control.”

  Rias smiled—polished, effortless.

  “Kaelan Arverth.”

  Five seconds of silence.

  Sona interlaced her fingers.

  “My Pawn turned out to be… less manageable than expected.”

  “Or more interesting than you anticipated,” Rias replied, stepping toward the window.

  Outside, students walked, laughed, lived their ordinary lives—unaware that two heiresses of the Underworld were discussing the weight of a boy who shouldn’t exist in any known calculation.

  “What happened with Raynare wasn’t an accident,” Rias continued. “That resonance… I felt it before I reached the church.”

  “It’s an imperfect power,” Sona said. “Unstable.”

  “And useful,” Rias answered without hesitation.

  The word lingered between them.

  Sona crossed her arms.

  “I do not share your optimism. Arverth is unpredictable. He disobeys direct orders. He acts on emotional impulse. And most concerning: his power responds to the emotions of others, not to his own will.”

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  “Sometimes,” Rias said quietly, “those who act on emotion are the ones who move the board the most.”

  Sona looked at her.

  “His interference accelerated the awakening of the Boosted Gear.”

  “And ensured Asia’s survival.” Rias held her gaze, unyielding. “I won’t deny he altered the flow… but not against us.”

  Silence.

  Tsubaki Shinra stood off to the side—motionless, as always, processing every word without offering any of her own.

  Sona picked up the pen and rotated it slowly between her fingers.

  “I do not like having pieces I cannot fully understand. Especially if they are linked to Hyoudou.”

  “Are you afraid he’ll influence Issei too much?” Rias asked, with something that wasn’t quite a smile.

  “I fear nothing,” Sona replied—her tone clean ice. “I calculate.”

  They held each other’s gaze for a long moment.

  Rias spoke first.

  “Kaelan is not an enemy, Sona. Nor is he a simple anomaly. He’s a disruptive factor. And tensions between factions are already shifting toward something more… active.”

  Sona didn’t answer immediately.

  When she closed her eyes briefly, Raynare’s echo was still there—the distortion in her territory, the emotional spike that had cut through Kuoh like a directionless lightning strike.

  Then she spoke.

  “Rias.”

  “Yes.”

  “If Kaelan’s actions affect my territory without my authorization, I will remove him from the field.”

  Rias smiled. Not challenging. Not mocking.

  Diplomatic.

  “And if his actions protect your territory… I trust you’ll recognize his value.”

  A brief glint flashed behind Sona’s glasses.

  “I am fair. Not blind.”

  “I know,” Rias nodded.

  There was a moment—strange, suspended between them—that wasn’t hostility or friendship. Something more precise. The silent recognition of two people who had just discovered they shared a variable neither had chosen and neither could ignore.

  Rias moved toward the door.

  Before leaving, she said:

  “Kaelan Arverth is your responsibility. But he is also part of Kuoh. If he becomes a problem, I’ll help you.”

  Sona lifted her chin slightly.

  “And if he becomes a problem for you… I trust you won’t interfere if I have to stop him.”

  Both smiled.

  A Queen’s smile. An agreement without written words. A pact between rivals who were, at the margins, something almost resembling allies.

  Rias left. Her crimson hair disappeared behind the door.

  Sona remained with Tsubaki in the restored silence of the office.

  “President,” Tsubaki said softly. “What are you going to do about Kaelan?”

  Sona placed her fingertips against the desk.

  “First,” she said, “I’m going to understand what he truly is.”

  A pause.

  “And second…”

  Her eyes shifted toward the window—toward Kuoh, toward the district she managed like a clockwork system and which tonight had trembled as if someone had altered its mechanism without warning.

  “…I will make sure that the next time he moves, he does so within my calculations. Not outside them.”

  Tsubaki processed that.

  “And if he can’t?”

  Sona gathered the documents with precise movements.

  “Then my job is to teach him how.”

  She said it without emphasis. Without drama.

  Like someone stating the next step of a problem she had already begun solving.

  A cold breeze brushed against the window.

  Somewhere in the city, Kaelan Arverth was walking toward his apartment with a seal on his chest and a direction he had not chosen.

  In the Occult Research Club building, Rias Gremory watched the same sky from the opposite side, considering a piece that did not exist on any board she had studied before.

  And in the Student Council office, Sona Sitri opened a new notebook.

  The first line she wrote was a name.

  Kaelan Arverth.

  Below it, a single question:

  What exactly are you?