create alias gita_(granblue_fantasy) -> djeeta_(granblue_fantasy)
create alias gita_(granblue_fantasy)_(cosplay) -> djeeta_(granblue_fantasy)_(cosplay)
create alias vila -> vira
create alias marie_(granblue_fantasy) -> mary_(granblue_fantasy)
create alias ferri_(granblue_fantasy) -> ferry_(granblue_fantasy)
create alias charlotte_(granblue_fantasy) -> charlotta_(granblue_fantasy)
create alias katarina_(granblue_fantasy) -> catalina_(granblue_fantasy)
create alias anira_(granblue_fantasy) -> anila_(granblue_fantasy)
create alias liscia_(granblue_fantasy) -> lecia_(granblue_fantasy)
The romanised forms don't normally appear in the game itself, but some have appeared in other official places.
In particular, there was a song first unveiled on April Fool's Day this year, and inside the PV, it showed all the names of the characters: Djeeta, Vira, Mary. Not perfectly clear, but the song was released later and the official tracklist uses Djeeta, Vira and Mary as well. VGMdb link for reference.
Djeeta also officially appears in the game Princess Connect as part of a collaboration event. Her cards all say Djeeta on them.
The GRANBLUE FANTASY グランブルーファンタジー GRAPHIC ARCHIVE, which is an official artbook publication by Cygames and should be considered authoritative, states Vila's name to be Vira, Ferri to be Ferry, Marie to be Mary, Charlotte to be Charlotta, Katarina to be Catalina, Anira to be Anila and Liscia to be Lecia