User blog comment:Water Dragon Slayer/DREAM BATTLE CHRONICLES: SIXTH MATCH!/@comment-5268982-20130821173514/@comment-7418318-20130821174242

But as we saw in her fight with Mirajane Mary doesn't take over all the magic of the target, but just one kind.

If she takes over the "puppet controll", Bickslow still has his Figure Eyes, which she has never seen him use, thus she wouldn't know that she has to avoid looking in his eyes.

So unless someone told her about it, it's rather unlikely that she'd avoid eye contact, particularly with the sadistic streak she showed in her fight with Mira. I think she'd like to see the pain in the eyes of someone who tried to hurt her, which would spell her doom.