Despite being ordinarily pretty roughly-spoken, all of the loyal Dressrosan soldiers address King Riku with very polite/respectful Japanese, even after he makes it clear he’s not their king anymore. His former commander here, Tank, starts by addressing him as あんた/anta before correcting to the more polite あなた/anata and switching to polite forms as he becomes more sure of ‘Ricky’s’ identity.
It actually reminds me quite a lot of how the the Galley-La shipwrights address Iceburg- they also tended to be very casual and rude in their everyday speech, but would always change to polite language when talking to him.










