The Ghost of Electro was the disguise of Maxwell Dillion. He was Electro, an enemy of Spider-Man. Electro died when he fell into a pool of red water.
He looks like Electro, but only with neon blue skin.
Maxwell Dillion hated people who came into his power plant because he wanted to be quiet and work on his own. When he was fired from the job. Maxwell assumed the Ghost's identity to get revenge on his boss.
Appearences:
Shock to the Spookstem.