Okay. There are are accounts calls PLZ accounts where they are just for that. I'm going to use the picture I made the face with as an example.
The picture is an avatar; your icon. This is yours:
Here's how to display your icon: type in:
:icon excalibis: (without the space)
Please accounts use this with a plz on the end, signifying it's not a legitimate account.
The face i used is called fatsonplz.
So type in :icon fatsonplz: without the space.