Kagami-sensei was so kind, even when signing for #29 of a line surpassing 120. Everyone was given the same large card/poster to get signed and yes, that is my name in the top right. My translation of our conversation is as follows:
KS: So are you Japanese?
Me: No, I’m American. Though right now, I live in Japan.
KS: wow! Your Japanese is great.
Me: Oh not really, but thank you very much.
KS: So who is your favorite character?
Me: Definitely Guren.
KS: Ah, I agree. He’s a strong man, ne? A very cool guy for sure (^-^)
Me: Yes. That is why I also like the light novels you write about him.
KS: Really? You read them?!
Me: Of course : )
KS: *handing me my signed card and shakes my hand* How amazing. Thank you so much for your support!
Me: Ah, thank you very much! Take care, sensei.
So ya. The first girl was practically crying while getting it signed, it was precious haha. He had a great sense of humor and took his time for each person, conversing with them while he signed. He also took a picture with a pair of Guren and Goshi cosplayers and posted it on his Twitter, the guy was just as thrilled as everybody else there.