Final Fantasy: Brave Exvius (iOS/Android) has been known to feature characters from other titles in the Final Fantasy series, even characters from the soon to be released Final Fantasy XV Kingsglaive.
Bringing their character pool to a whole new level, Final Fantasy: Brave Exvius will be adding American singer and actress, Ariana Grande into the world of Final Fantasy: Brave Exvius! Yesterday, 2nd January, 2017 Ariana Grande made her Final Fantasy: Brave Exvius appearance official with a sneak peek of her in-game character design.
This is the first time the game has turned real people into in-game characters. Will this be the first of many to come? Only time will tell.