Devils in the Nentir Vale
Fo is the 3rd child of Silas and Koa’ Raincloud.
He adventured with the party at the Lair of the Adamantine Dragon, Karonzaxus. In that lair, Fo died, and Abraxus the Dragonborn brought his body back to Fallcrest. He was raised from the dead by the High Priest of the House of the Sun, Grundelmar the Dwarf.
Several days later, Fo left Fallcrest and renounced Pelor. It is unknown where he went.