Shepherd
From A Wiki of Ice and Fire
The Shepherd was a crazed prophet who lived in King's Landing during the Dance of the Dragons.[1] He was a follower of the Faith.
Appearance and Character
He was one-handed, religious and insane.
History
The Princess and the Queen
During the riots in King's Landing the Shepherd began to rant against dragons, not just the dragons that were coming to attack the city but all dragons everywhere. The half-crazed crowd listened to him preach and after he was done ten thousand throats cried "Kill them! Kill them!", and much of the mob headed for the Dragonpit, where three of the blacks' dragons and one of the greens' dragons dwelled.
His ultimate fate is not confirmed, however he was most likely killed during the Storming of the Dragonpit.