Some time before meeting Eva Nine, Otto and his mate were separated from their herd and captured by Besteel. Otto's mate was killed for food, but Eva and Rovender Kitt managed to free him. In return, Otto helped them escape, and remained loyal to Eva Nine for saving his life.
The Search for WondLa
After Otto's first appearance in the book, he helped Eva and
Rovender escape from Besteel's camp and return to Sanctuary 573. He later warned Eva of Besteel's arrival when the two were rescuing Muthr from the ruins of the Sanctuary, and traveled with them to Lacus.