Nilan

"Actually, you don't know the truth."

Nilan Johnson is the final boss of It's Half life, and possibly the leader of the alien race responsible for the invasion of the Mesa Black Research Center. He aims to kill those he deems as "unclean," and falsely believes that he and is fellow aliens cannot die. When Cicero arrives at his lair in the Lost World, Nilan promptly accuses him of making a strawman argument and begins attacking him. However, Cicero successfully prevails against him.

Quotes
"Other..."

"That's what you did."

"Not just because you're not alone."

"Last person, last person..."

"Strawman!"

"We do not die, we do not die, AND we do not die."