When he hatched, Cornelius was nearly killed by a pure one, who thought him as "Not even the meaning of impure, but the most impure." Cornelius was saved accidently by a Search-and-Rescue Chaw member. Yuone and the other paraliment members didn't know what to do, because Saltwater crocodiles were known to be extreamally dangerous. Cornelius fought off a crow mob that was flying above the water, therefor giving Yuone the new idea-a Gaurd Crocodile Guild.
Cornelius became the ryb of the guild as more Crocodiles, Gharials, Alligators, and Caimans came. This proved as a good defense force for the tree. Cornelius became freinds with Bittermore, a Gharial in the guild. Sometimes a Nest-Maid can become evil, but this is rare. When it happens, Cornelius has been known to eat it with Bittermore.