Biff the Understudy

Biff the Understudy is a meta-character in the Baldur's Gate computer game, and a minor character in Baldur's Gate II: Shadows of Amn. Many conversations in Baldur's Gate require a certain NPC, and in case such an NPC is accidentally killed or otherwise not present, the game summons up Biff the Understudy to say the required lines. Biff can actually join the party in some instances, though his statistics leave something to be desired. He also has a brief cameo in Baldur's Gate II, messing up his lines as a substitute for Haer'Dalis in Raelis Shai's theatre performance in Athkatla.