Oh, we fully intend for their names on the Taken page to be their actual real names due to the title system Servants have in the series. Except Nero's might be shortened to just Nero since dang it's long. I'm just talking about the IC name.

As for my question, I meant the name they remember when they arrive. Which will likely be simply Arturia and Nero if we can only choose one. I don't follow the fandom so I don't know what any nicknames in fandom they are.

Anyway, I'm rambling. Thank you very much for the help!