Starwizarc

Chiara is just girl!Raven. Exact same growths across the board.

So in Chapter 18 you need to fight Dione with both Cynthia and Eliana. After then defeating her, she will flee instead of dying. THEN, in Chapter 19, Dione will appear as reinforcements sometime during the chapter (Turn 8 or so I think?). Just to be safe, I fought her with both Cynthia and Eliana again, without defeating her, but I'm not sure if those two fights are necessary. After that, she will appear again in Chapter 20 on Turn 1 under your control. Can't say anything about support convos.

Now I'm not 100% certain about this, but there's the secret Druid that requires you to stand on a specific tile in a later level, and a certain lategame Falconknight boss that has special dialogue and doesn't outright die if you battle her with both of her comrades-turned-allies. Whether that means she shows up recruitable later, I dunno, but it's something.

Hows work on the final release going? Are you going to be putting out a guide on how to recruit the secret/hidden characters, or just let people find out on their own? Hopefully you can get it out before the end of the week, before Octopath Traveler steals me away for a long time.