[quote]Ralts ⚔️ Everybody else.[/quote]
Toshi: Too oblivious and in too much of a rush to notice.
Ralts: And that's when I swore my undying vengeance.

Beyond wanting to chat up Tilly but her being busy he hasn't caught much of other conversations so he doesn't actually know Ryuuichi is blind yet. There's context clues he could use to put it together if he ended up spending a bit more time around Ryuuichi, but for now he thinks Ryuuichi is just a shy guy who "probably" needs Shia Labeouf motivational speeches blasted at him in stereo.