It's a team building thing. You know kind of a 'if you can deal with the silly code name you can probably deal with Scott waking you up at 4am to go on a jog" thing. And I mean, you probably do that second one, but you know, everyone gets a silly code name until they get to pick their own. It's a thing.

Maybe something with crows or ravens. Korvus sounds like Corvus which is the genus crows are in (I totally wikipedia'd that because I totally had no other good ideas)

Edgar. Your trainee name should be Edgar.