Who is The Officer from Notes from the Underground and what is their importance?

The writer first meets the officer when he's standing in the officer's path. The officer moves him to the side, seemingly with no thought to the writer. This angers the writer and he seethes about it for years until he arranges to be in a place where he's certain to meet the officer. He plans to refuse to step aside, allowing himself to bump into the officer. This happens but the officer hardly notices the encounter at all. The writer, however, is jubilant, thinking that he had succeeded in setting himself up as the officer's equal.