"Signals then. Things he will recognize even if he's not thinking along the same lines as you are." Which means, they should be clear enough for Ignis to spot for what they are without knowing as well should he not be paying attention or happens to walk in on them talking together. Ignis approves of this solution a lot. It's a good compromise. It's not going to be perfect, of course, but it should help.

An slim eyebrow raises when he hears that last statement though, "I swear if you don't tell me the story behind that, I'm kicking water on you no matter how good this feels at the moment."