Due to the fact that they hadn't exchanged names in their previous encounter, when Raven knocked on the door of B-03, he'll be surprised to see who was behind the door. He never got the details of who sent letters to and from Yuri, since Yuri had spent that time getting a good laugh.

Needless to say, Rukia's only hint that connected Raven from the letters and Raven now, is the fact that he was holding ingredients. He didn't look nearly as old as they claimed him to be.