Not to be confused with Kalron
Kilron is found on the south-west side of the wall separating east and West Ardougne.
He plays a minor role in the Biohazard quest by helping the player leave West Ardougne without alerting the mourners by using a rope ladder to climb over the wall.
After the quest, you cannot use Omart's ladder, though you can use Kilron's, but the gate to the city, which was previously locked, is unlocked. This renders the ladder useless, other than for a shortcut.
In the Song of the Elves, he is part of the resistance and he and Omart suggest riling up citizens by announcing that all doctors and nurses have to retrain.