Minfilia (spoilers ahead)

[Enkidoh]

Greinfarr is involved in the Blacksmith questline.

W wait.. what?! Damnit, I think I'm going to have to level BSM now just to see this! As the original GLA class quests in 1.0 pretty much screamed

that Greinfarr was actually dead - killed in battle with the Wood Wailers in the Black Shroud when he fled Ul'dah for Gridania with the Hellfire Phoenix after throwing a match at the Colosseum backfired on them.

Of course the last thing the player sees (through the Echo) is Greinfarr shouting and charging the Wood Wailers with his sword drawn, before the Echo scene ends abruptly, which leaves things deliberately ambiguous in hindsight, but the context of the scene and the comments made by the Hellfire Phoenix afterwards, basically all but screamed he was dead, saying that 'Greinfarr gave his life for her and that she intended to honour his sacrifice by turning her back on the arena and instead joining the Wood Wailers.

But then I guess as Hildibrand has shown, there pretty much is no such word as a 'dead' character in ARR - 'put on a bus' maybe, but not killed off for good.