Hueco Mundo, Las Noches.
Since he was not in Seireitei, Ailin had no idea just how much damage the Quincies' second assault had inflicted upon Seireitei.
But to Ailin, as long as the people he cared about were unharmed, none of it was a problem.
He had long since given targeted training to Byakuya Kuchiki, Toshiro Hitsugaya, Rukia, and the others.
Even if their Bankai were stolen, relying on their Shikai abilities to fend off enemies unfamiliar with their own Bankai would be easy.
Besides, although Ailin was in Hueco Mundo, he had left two powerful Zanpakuto at Haruko Kuchiki's side.
Should any crisis arise, both Alice and Artoria would act.
If they encountered an enemy neither of them could handle, one of them would choose to return to Ailin's Unlimited Blade Works. Ailin would naturally sense it then, open a spatial passage beside the other, and instantly return from Unlimited Blade Works to Seireitei.
After killing and capturing a batch of Arrancar, the Quincies had shifted the focus of their attacks to Seireitei and had not continued attacking Hueco Mundo.
Thus, Ailin had enjoyed a rather peaceful few days in Hueco Mundo.
Of course, although Hueco Mundo was no longer under attack from the Quincies, Las Noches itself was far from peaceful.
The Second Resurrección Ulquiorra had revealed during his battle with Quilge Opie several days ago had shown Grimmjow the direction in which he could improve his strength.
So during this period, Grimmjow had constantly pestered Ulquiorra for fights, hoping to comprehend Second Resurrección through battling him.
Of course, Grimmjow's current strength was not enough to force Ulquiorra to use Second Resurrección.
However, perhaps because he had gradually come to understand the existence of a "heart" over their years together, Ulquiorra did not use Second Resurrección in his