Grecks can be found in the north east of Freeside, and is easily recognized by his lazy eye. He has a history of gambling and drinking, and does not like to pay his debts. According to him, he got his lazy eye from an incident with a "scum-humping water baron."
If the player chooses to make fun of his lazy eye, Grecks will get angry. If the player makes further derogatory comments, Grecks will turn hostile. Killing him will result in negative Karma and Freeside infamy.
Once you are done with Francine's quest, Grecks will loiter around Freeside (should the player deal with Grecks in a non-violent way while working on Francine's quest) and will attack any random Freeside thug that may spawn as the player moves around Freeside. Grecks will eventually die, since he doesn't heal after each fight.
While ghouls rarely have facial hair, Grecks has a beard.
He is one of only a handful of characters that have deformed faces.
If your Speech skill is high enough (60), you can convince him to literally give you the clothes off his back. This results in a loss of Karma.