Not much is known about Kilnas, he first showed up 1000 years ago on the island of Hetand and has been killing Toa since then including Toa Soles who sacrificed himself to save his Matoran village. He has been hunted by Buskyte. ever since then.
He is heavily inspired by Zoom from the Flash tv show.
He has rocket boosters on his legs to make him run and move faster.