User blog comment:Xilinoc/Everything but the Rain op. 10 - "Prinz von Licht"/@comment-6342763-20130515161127/@comment-6904925-20130515165044

That does explain how Uryu never used Blut, before I thought it was just an advanced Quincy power, but sinced his a mixed Quincy and they take time to train to use it.

(By the way, what chapter did you see Ryūken's mother got a nasty scar on her leg)