User blog comment:FairyTailFan/Juvia didn't need saving?/@comment-4829046-20130614044511

I'm just gonna go with the most logical thing in the debates(even though logic doesn't work in FT like MDM said). Some magic can hurt Juvia and Gray didn't want to take chances since he is chivalrous.

Or, Juvia's water-body only works when she is alert and when she goes to "Gray-sama mode" she is as vulnerable as crap.

Or the stamina thing like B4 said.