Iowa speaks in katakana (used for foreign words) while Yamato speaks in hiragana. Not sure how to represent that in text, she's not speaking bonin english as she does in the game, but I think it's neat.
Bono-MisakiAdmiral! Musashi has finally arrived at our naval district! Musashi-san! Musashi calls me onee-chan!Okay! Onee-chanHi! Please take care of me and Yamato!