User blog comment:B214/Talk About What You Want! 2/@comment-24098614-20140928023942/@comment-24502975-20141009234715

Technicality time!!

She first reached her 2-tail form when she entered Nekomata lvl 2 mode during their Rating Game against Sairaorg.

He talked about her form when she first revealed it in volume 16. Please, just re-read the novels when you have questions like this.