User blog comment:Xilinoc/Ch. 562 - THE VILLAIN 2 (Mask De Masculine is a Mexican luchador in a German army)/@comment-5551986-20131219180832/@comment-10554972-20131224002530

About Mask blocking Kensei's punch but coughed up blood from Renji's elbow, Mask was probably using Blut Vene to block the punch, but was probably using Blut Arterie for his headbutt, so wasn't defending at the time of the elbow. He was caught by surprised after all. That said, I don't think it completely justifies it all, since Kensei is a Hakuda specialist with a Bankai that enhances his strength, but it should still be noted.