[and now he looks like he just realized something]
So that's why your weapon just didn't feel right. My soul wavelength and Tsubaki's are a perfect match, so we can work together. But your weapon doesn't have a soul at all.
...
Hey, think I can ask some Ophiuchus to bring Tsubaki here? I mean, she's a girl, but she's my weapon too. I bet you two would get along.