I just did not know that i needed to substitute in FEditor the name ''Eirika'', other than in the stats screen, in every dialogue and other with ''Replace All'.
I don't know if the Anti-Huffman thing was a problem too.
Opened Feditor > Text Editor > i search ''Seth'' > I found a string with written only Seth and i change it to ''Marga'' > ''Save'' > and i change names to Eirika, Franz and Gilliam > open the game > this happens.