Board Thread:General Discussion/@comment-11003280-20130620163542/@comment-11051098-20130628170318

Wonderweiss had been modified and had pretty much forsaken everything he had - speech, memory, intelligence - for the sake of achieving the ability to seal Ryûjin Jakka. But it seemed that also made him extremely durable physically.

Like you said, he defeated Kensei with his Bankai, and gave Yama-jii a hell of a beating, although Yama-jii easily killed him with Sôkotsu.

He had a hard time with Mashiro, but she apparently had not fought much if any with her mask on, as she thought it would last as long in battle as outside of battle, and when that happened, he took her out with a single punch.