Greldo is a goblin with a speech impediment found in Goblin Village. When talked to, despite not wearing any himself, he will proclaim that green armour is best, implying he is one of the followers of General Wartface. Players are able to question him on why he likes green armour, upon which he will reveal that he likes green because it's the same colour as cabbages. He expresses extra fondness for the cabbages in Draynor Manor.
Players are also able to question him on his lisp, although he seems to be completely unaware that he has one.
In the former Black Knights' Fortress quest, he was the servant of a Witch known as Lensig who was employed by the Kinshra to brew an invincibility potion that they could use to capture Falador. During the quest, he was tasked by his mistress with obtaining a certain type of cabbage from Draynor Manor for the invincibility potion, being given strict instructions to not use an ordinary cabbage, as it would disrupt the spell. The player then foiled their plan by dropping a regular cabbage in the cauldron from a hole above it.
- Greldo is one of the few modern day goblins in RuneScape whose name does not consist of an unpleasant word and a body part. He shares this trait with Yelps and Thump-thump.
- He was one of the few goblins to not use the updated goblin model, along with Wormbrain, Thump-thump, Grimechin and Hopespear. Instead, he was updated on 19 December 2012. His examine text was also changed from "An ugly green creature." to the current one.
- He was briefly removed with the release of The Death of Chivalry, but re-added shortly afterwards on player's request. His dialogue concerning Draynor Manor cabbages references the old Black Knights' Fortress quest.
- When you correct him on his pronunciation of cabbage, he calls you a "Grammar nart-thee", a mispronunciation of "Grammar Nazi".