This top icon identifies a user as a WikiWitch. It is also an alternative (or complement) to the user box {{User wikipedia/WikiWitch}}.
Add {{WikiWitch-icon}}
to your profile to display this topicon at the top right corner of your userpage.
You can set the position from the right using {{WikiWitch-icon|sortkey=x}} where x is the position. Defaults to 0. Alternatively, you can set the distance from the right in pixels, like so
{{WikiWitch-icon|extra_offset=30}} to offset the icon 30px from the right. Defaults to 10.