Tonila was an Aztec who was one of the Priests of Knowledge in the 15th century. He prepared Tlotoxl a poison for Barbara Wright as a test to see if she really was the god Yetaxa reincarnated. Before she could take it, she found out on her own when they failed to drink it. When the High Priest of Knowledge Autloc left for the wilderness, Tonila took over the position. (TV: The Aztecs)

He later helped Tlotoxl to prepare cocoa. (HOMEVID: Making Cocoa)