[Action]
No, really it's not- [Hisoka stops and makes an annoyed sound, but it's mostly out of embarrassment. Notice though that he doesn't promptly hand back the blanket.
He stares at that hand for a few moments, as if wary, but then reminds himself that his empathy is restrained, so he has nothing to worry about] Hisoka Kurosaki. [He takes her hand and shakes it gently] Nice to meet you, even if we are in prison.