I entered the world with a friend and after a while he put me as another user losing my things (don't change my name) and now he changes me between one character and another

I entered the world with a friend and after a while he put me as another user losing my things (don't change my name) and now he changes me between one character and another.

Now there are two characters called "Yarsega" and it switches me between both characters when I disconnect and reconnect.

I continue ussing the same account, and never change his name.

 

I connect by lan with a friend