[Yasusada lights up at the word spirit, and nods quickly.]

Yes, that's right. I'm a tsukumogami, the spirit of an object that's been around for a very long time! In this case, I'm the spirit of the sword Yamatonokami Yasusada. And that's my name! I was forged over five hundred years ago.

S-sorry, I guess I'm not very good at explaining all of this! Back home I live with a lot of other swords, so all I have to tell them is that I used to belong to Okita Souji and they know what that means already.