The plugin uses an emoji instead of a Font Awesome icon, so it looks different depending on the emoji set you choose.
The fact that it looks different depending on the emoji pack configuration is also somewhat confusing. I am used to such things looking the same in all forums that don’t use a custom icon set.
Furthermore, icons adapt to the color scheme, which emojis cannot do. I am also in favor of a change, perhaps to user-pen.
That could also be used in the places where currently the simple pen is used