The day after Orihime was captured and taken back to Las Noches by Aizen, Yoru Machi, who was in the Soul Society, learned of it.
Aizen was still thinking of using the Arrancar girls to seduce Yoru Machi, yet he had no idea that the Arrancar girl on their side had, in fact, already been won over by him.
As Aizen's right-hand man, Ichimaru Gin had access to plenty of core secrets, but making moves under Aizen's nose was not as easy as it sounded.
Moreover, as fellow traitors of the Soul Society, Tousen Kaname had always been suspicious of Ichimaru Gin. He wanted to kick the second-in-command out so that, as the third, he could take his place.
Ichimaru Gin, surrounded by enemies, had always been walking on thin ice. Yet no one had expected his situation to suddenly change a few months earlier.
Tier Harribel, the Third Espada, had suddenly asked to meet him on the rooftop... no, at the summit of Las Noches.
As everyone knew, undercover agents always met on rooftops. That was an ironclad rule across all worlds.
Ichimaru Gin had not interacted much with Tier Harribel, but despite his doubts, he ultimately chose to meet her.
When they met, the straightforward Tier Harribel bluntly revealed Yoru Machi's existence and told Ichimaru Gin that Yoru Machi had sent her to find him.
Yet Ichimaru Gin did not immediately choose to believe her.
After all, Ichimaru Gin was no rookie. The reason he had been able to lurk at Aizen's side like a venomous snake for so long was his intelligence and caution.
Tier Harribel had only met Yoru Machi once in the Human World, and the Espada were utterly loyal to Aizen. Even Ichimaru Gin was not confident he could turn her, so how could