Smiley
Throughout the series, Ernie's companion is Smiley, a wise-cracking smiley face button usually attached to the lapel of his jacket. Smiley serves as the conduit for the arcane energy that gives Ernie his powers, as well as the comic relief of the series. Smiley claims to be Ernie's super-ego and is sometimes at odds with his friend's decisions, such as when Ernie resurrected his parents in order to confront them about their past. For the most part, his personality is more easy-going and comical than Ernie's.
Read more about this topic: Evil Ernie