Release date 23 October 2002 (Update)
Members only? Yes
Race Human
Quest NPC? Biohazard
Location Varrock
Sells items? No
Gender Male
Notable features Elena's former teacher
He's not that ill.
Guidor chathead

Guidor is an old friend of Elena. He is located in the most south-east corner of the gated area in the south-east corner of Varrock, in his bedroom. During the Biohazard quest, the player is sent to give him a plague sample, touch paper and the three smuggled liquids. Upon conversing with him further, he will come to an interesting conclusion about the sample you have brought.