Ilujanka

The Dragon Riders are a mysterious race. They are mentioned briefly by the warrior Viggora as having been active during the Second Age. In Postbag from the Hedge 43, however, the Mahjarrat Enakhra denies their existence, making the accuracy of either claim unclear. Enakhra is also unaware of the Dragonkin, so it may just be ignorance on her part.

The dragon riders have only been mentioned once throughout RuneScape, during the Ghostly robes miniquest. During the miniquest, Vigorra mentions that Zaros used the dragon riders as personal bodyguards alongside demons, vampyres, and Mahjarrat during the Second Age.

The dragon riders are believed to be a race because the ghost also mentions that Zaros only ever chose a few humans as bodyguards. They were also comfirmed to be a race during the first Runescape Livestream Q/A on September, 9th 2012. This would suggest that the riders were not humans, ("THEY ARE A RACE AND DEFINITELY NOT HUMAN."-Runescape Livestream) but an entirely different species. However, the way in which the ghost says this, "Oh yes, the dragon riders, Mahjarrat, demons, and vampyre warriors made up the bulk of the force..." suggests otherwise.

It is also possible, but unlikely, that it could refer to Dragonkin. Seeing as Dragonkin created the first dragons they could well have ridden them into battle. Also it is often forgotten that Dragonkin were still an open, and much feared threat before Robert the Strong defeated them. After Zamorak overthrew Zaros, the dragon riders were no longer necessary as bodyguards; instead, they rode Dragons into battle against the other gods during the God Wars. However Jagex made it sound like they were a never before seen race.

Known Dragon Riders:

Hannibus - last known Dragon Rider