This is supposedly a Hanazawa Kana seiyuu connection, but I don't know the character on the right.

HanaKana voices neither character (Ionasol is voiced by Kakuma Ai and Escha is voiced by Murakawa Rie), though, and searching her Japanese Wikipedia page turns up no connection to either game. So, what is the specific connection here? Both games are by Gust, so that's what I'll go with just that for now.