Let's see. When kazumi was disguised as a girl, she was passed out with a towel on her face, with the other girls saying that she should cover her chest. During that part where lucy was covered in that censoring grid magic, lucy got some of it on her face and then she said "nobody will be able to tell who I am". During .. ugh, what's his name's introduction, the magnetic pervert, he tried to grab her breasts, but her face was never shown.
There's 3 or 4 more places she shows up, but I don't remember them right now.