I've had the Katar equipped for a while now, and it's been glitched to my avatar! No matter what I try, it stays there.. >_<
I've even taken it off and sold it, but nope, still there.
Can someone help me!?!? I'm tired of having it on my avatar..

Did you try the "unequip all" button?

And if Cherry's suggestion doesn't work, you could always refresh your avatar in the Avatar page~ :'D <3<3