P'leen was one of the riders that was considered to distribute the vaccine for the plague because his Weyrwoman Dalova strongly suspected he (regularly) timed it with his dragon Aaith. It seems P'leen took over leading the Igen Weyr wings when Weyrleader L'bol was sunk in apathy because of the losses his Weyr had taken from the plague. This means P'leen must have been a wingleader. During the time of Moreta's Ride.