>>106754239I sure hope you ain't trying to add this to ublock or some shit. Add this to custom CSS on 4chan.
Blockquote is the HTML tag that this message is inside.
It hides the Anonymous name and replaces it with Koa, and the blockquote part just adds aku after every post message.
But I also just realized it is broken on Firefox.
Seems Gecko doesn't like semi-colons.
.name {font-size:0px; }
.name::after {content:"Koa";font-size: 10pt; }
blockquote::after {content:" aku"; }