Hearing this, Kurotsuki Renya suddenly stood up, his expression tightening with restrained frustration, while Unohana Retsu's brows knitted in quiet disapproval at the implication.
Renya forced his tone to remain steady.
"Captain-Commander… with respect, if I were Urahara-san's agent, why would I expose Aizen's entire plan? Why return now, knowing full well I would be surrounded by captains who could kill me instantly?"
Yamamoto's gaze remained unblinking, stern enough to chill the air.
"Many possibilities must be considered. Even improbable ones."
Unohana spoke up gently but firmly, her voice carrying the subtle authority only she possessed.
"Sōtaichō, Kurotsuki-san entrusted that letter to me thirty-four years ago. I opened it years later, and the details he wrote then match perfectly with current events. Such precision cannot be fabricated retroactively."
Renya bowed his head slightly.
"My only intention is to prevent Aizen from obtaining the Hōgyoku and endangering Seireitei. Everything I've done was to survive long enough to make this warning."
Yamamoto's eyes narrowed further, piercing through Renya as though trying to read the truth in his very soul.
"If what you say is accurate, then Aizen Sōsuke's betrayal runs far deeper than we imagined. However, if even a single element is false, it would mean treason at the highest level."
Renya didn't flinch.
"Then test me, Captain-Commander. Test everything I've said. Examine Aizen's spiritual pressure residue on the faux corpse. Compare it with his past records. Check the timelines of the Hollowfication incident. Consult Urahara Kisuke in the Living World — you'll find the same truth reflected from every angle."
Unohana nodded subtly.
"I have personally confirmed the faux-body is a spirit skeleton. No ordinary Reigai. This is advanced concealment that only Aizen and his Kyōka Suigetsu illusions could produce."
Yamamoto slowly rose to his feet, his spiritual pressure surging enough to shake the wooden beams overhead.
"Very well. If Aizen's deception is genuine, he will answer for it. And if Urahara's role has been falsely maligned, justice will be restored. But until undeniable proof is gathered…"
His gaze sharpened like a drawn zanpakutō.
"…you, Kurotsuki Renya, will remain under Unohana-taichō's supervision. Any attempt to flee will be treated as confirmation of treachery."
Renya bowed again without hesitation.
"I accept those terms. My life was never the priority. Stopping Aizen is."
Yamamoto's stern expression shifted — only slightly — acknowledging the resolve in Renya's eyes.
"Then prepare yourself. The truth of this matter will be revealed swiftly. And when it is…"
A faint crackle of heat radiated from his staff.
"…Aizen Sōsuke will face the full judgment of the Gotei 13."
Unohana lightly touched Renya's shoulder, guiding him out of the room.
The moment they stepped into the corridor, she whispered calmly:
"You handled that well, Kurotsuki-san. Few can withstand the Sōtaichō's scrutiny without faltering."
Renya exhaled slowly.
"I don't have the luxury of fear anymore, Captain Unohana. Not with what's coming."
She nodded, the faintest smile forming not of joy, but of acknowledgment.
"Then let us ensure that Seireitei is prepared for Aizen's true face to be revealed."