[Souji nods. Understandable that it doesn't mean much to Rain - much as Rain's list of names doesn't mean much to him.]

He was someone... important, I think. I wish I could remember.

[He shakes himself out of that train of thought, and takes another sip of tea before looking up at Rain again, slightly more determined]

I promised Hijikata-san... that I'd return. I'm going to keep that.