Allen didn't see how it mattered what Renji was. He saw Renji as an Akuma, but it just wasn't the same. Renji was warm, not cold and mechanical like the other Akuma, and even if he was rude sometimes, he was still a nice person. This place made it all the more difficult to see who their real enemies were.

He didn't add anything, instead letting the two make their own introductions... or whatever it was they were doing might be called.