[Yes, just call her Vietnam! Though, she's used to others calling her Vietnam-san, including Japan himself. She really doesn't mind, as long as it's giving her too high a level of respect. What a humble sword spirit though! (once she realises)]

Yes. Is there any preference on how you would like me to call you? Mutsunokami? [She's assuming to take the first one right now!]

And no, it's an honour to meet you. But have you? [Probably from history, seriously.]