Did we figure out who that other character designer is? Like what has he done previously?
Roberto Ferrari is a long time artist at Square Enix. He mostly worked on their B-tier stuff and iOS/DD stuff, providing illustrations and designs. Last Remnant, Song Summoner, Moon Diver, etc. He has a rather distinctive style which is rather flamboyant, but I'm not sure if that's due to the fact that he worked with Naora a lot and got influenced, or if it comes from a European art background. Maybe both I guess.