Perfect Cell
A bio-android created by Dr. Gero, Cell was designed with the burning desire to consume biomass to become stronger and evolve. In order to reach his perfect form, he needed to consume Androids 17 and 18, which were some other of Dr. Gero's creations. He was destroyed twice: once In a battle with Gohan, and the other in a future timeline while fighting Trunks, a time-traveling half-breed saiyan.
Example:
Perfect Cell: I AM PERFECT!!!!!!
Gohan: *kills cell*
Dead Perfect Cell: OH NO I'M NOT PERFECT!!
Perfect Cell: I AM PERFECT!!!!!!
Gohan: *kills cell*
Dead Perfect Cell: OH NO I'M NOT PERFECT!!