At the unexpected question Tonbokiri laughs, looking around Mikuniguro's neck at her.

"I apologize for laughing, but it is a rather interesting question! No, I am not a samurai, but my former master was the samurai and daimyo Honda Tadakatsu. I am merely the tsukumogami of that man's spear."

If she is friends with Midoriya, perhaps she also will understand?