Ed is shown to be bossy, nasty, hostile, antagonistic, unfriendly, petty, and grumpy, but fears his wife Bev and his boss Mr. Dupette. He is known to dislike Rocko, Spunky, Heffer, and Filbert and yells at anyone he sees and grumbles bitterly under his breath at any situation he finds even slightly troubling.
There were even rare occasions where he had a bad relationship with his daughter Rachel, such as when she did not want to follow in his footsteps and when she came out as a transgender woman. They eventually made amends when Rachel came to Ed and Bev's anniversary party and when Rocko reminds her that he can't get rid of his own daughter. Ed's catch phrase is "I hate my life." which is usually said when he gets his comeuppance.
Despite his grumpy and unpleasant personality, Ed is not without soft sides, and with help from Rocko and Rachel, he is able to see the error of his ways. In later episodes of the series, especially in Static Cling, Ed is eventually on better terms with Rocko and becomes much more friendly, even telling him that there's more to life than The Fatheads and encourages him to embrace change and the people they are with.
Ed has green skin, blue lips, has a few hairs on his head and usually wears a white shirt under brown dungarees and a black bow tie. Ed was once known as the handsomest man in O-Town until a blender accident that was caused by Heffer when he was the Bighead's newspaper boy.
"I hate my life."
"I have no son!"
”I’m Edward Bighead!”
Despite aging in Future-Schlock, he still looks the same in Static Cling.