Basil is the bored gorgon of the group, they enjoy skateboarding and chilling out with their buds. Basil is non binary, so they can be voiced by anyone with a mid-tone voice, either a lower feminine voice or a higher male voice works. As mentioned, the tone of their voice is almost always somewhat bored or low, so even when there's an exclamation or an intense situation it should be kept relatively down low. As a bit of a voice quirk, I think it'd be fun to have a slight lisp, but nothing over the top. A good reference would be Raven from Teen Titans.