Shower thought: What if DRY1's calculator shopkeeper had a unique font that resembled seven-digit displays? This is a shitty mockup, it might look better as all white. If you're willing to use configurations associated with numbers for letters, you can write every letter legibly except for G, K, M, W, V and X. The shopkeeper not being able to say Kanako's name could be a bit of flavor with that in mind: he knows Chujin, Ceroba, but he's not sure if there's a "Canaco" or if that's wrong