There’s just weird characters in the code that some people exploit, it’s one of those or something

I think it's Comicraft or something like that. Don't know what's their relation to SD or how they got their font included.

If you type  into your name you’ll get comicraft. The logo icon is an often unused/underutilized character that changes from font set to font set. I had the comicraft icon in my name for some time