Masami Eri is a character in the anime series Serial Experiments Lain. He was originally a programmer for Tachibana General Labs, but was fired when his code contained information it was not supposed to have.

He was in the proccess of writing the seventh IP Protocol, and had programmed himself into the protocal, n a vain attempt at eternal life.

He eventually gave up his "real life", and killed himself, and became a psudo-god to The Knights, a god on the Wired World.

Lain has to face him as her creator/enemy in the series, and the outcome is quite fancy.