>>52303098It's because it came from a guy she collabed with and was in her "circle", and not a complete stranger. Backstabs hurt the most because they come from people you trust.
That's also the reason she defended the guy, because she thinks the best of him, because of that closeness.
Same thing happened with Nuxtaku, notice how his exuberant person just wilted when confronted with the fact that his supposed "friends" in VShojo were now stabbing his ass.