@Ataru I remember in one extra chapter (can't remember number) she did say Ichikawa was kind of like a cat. Being somewhat standoffish, as cats usually are.
I agree, their tr choice makes totally sense. I didn't think about it first when reading the raw, because Yamada insisted on him sending her a picture as well, not explaining what kind of a picture. Japanese language can be quite ambiguous in that regard, and that is half of the fun.