Yup same here, my main from Odin just vanished. I was on the forums during maintenance with it, no problem.
A few minutes ago when I came back on the forums "Please choose a character" and Necato was not there. Checked the mogstation, disappeared as well.

I called friends currently playing, they say my character's name is still in their friend list / LS / FC. So that's reassuring, in a way...