Wizard Acantha

Wizard Acantha is a member of the Runecrafting Guild. She is notable for being the NPC leader of the green team in The Great Orb Project, and as such players can talk to or right-click Wizard Acantha to join the green team (as long as there is not an excess of players on the green team).

Altarology
In the debate over whether the green or yellow orbs are fundamentally manifestations of the energy of the Runecrafting altars, Acantha's standpoint is that the green orbs are the "correct" orbs.