I recently became a member, and because of my hectic schedule currently, I will only be editing grammar, spelling, and other mechanics.
I was fortunate to receive good grammar education when I was very young, so I am able to notice minor mistakes when editing papers. That is not to say I'm perfect, of course.
I'll see if I can help with grammar, and I encourage other new members to help out too. I look forward to working with the Fairy Tail wiki in the future.