A Grey Knight is the combination of a Black Knight and a White Knight, which makes it neutral and non-discriminating against others. A Grey Knight doesn't boast about any type of power other than not being better or placing him/herself above other colors of knights.
Person 1: I want to be saved by a White Knight, because he's so strong and mighty.
Person2: I would rather be saved by a Grey Knight, because he's neutral and doesn't think of himself as higher placed than the others.
Someone who defends an unknown person who has been warned or punished by a moderator especially when the reprimand was deserved but the grey knightfeels the need to stick up for him regardless.
When the moderator warned a player for shouting racist insults over his mic a grey knight kindly told the moderator to chill out.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)