Kaiki Deisu

A character from the Monogatari series, who introduces himself as Ghostbuster, but is actually a trickster, is often described as sinister. Even the name itself is ominous.

He's obsessed with money. It's his values, his beliefs, his purpose in life. If he didn't have one life, he would die for money. He doesn't save his money, but seems to spend it as he earns it.