Posted! It’s been a bit so apologies if I remember planned stuff wrong, but went with the assumption that Ryuu saw Eikichi as a kid a few times via Mikako’s friend group, but since he would’ve tried to avoid getting too close, he wouldn’t immediately be able to place his face. He might’ve seen him around a few times in present day around town, but without a name to attach to him, wouldn’t have thought much from afar. Also probably wouldn't be aware of his reputation yet.