document.querySelector("#user-plus-gate").remove()
    document.body.classList.remove("csm-premium-gated")

There's also a pair of more comprehensive reports (linked from the main page) on:

Social AI companions in general: https://www.commonsensemedia.org/sites/default/files/pug/csm...

Character.AI in particular: https://www.commonsensemedia.org/sites/default/files/pug/csm...

this guy javascript debug consoles.