Mega Man Volnutt’s profession in Mega Man Legends is a Digger.
In the Legends setting, Diggers explore ancient ruins on a largely flooded Earth. They search for quantum refractors, valuable energy sources that power the surviving communities. Volnutt lives aboard the airship Flutter and takes on ruin-exploration missions alongside Roll Caskett, his Spotter.
The profession is central to the game’s identity. Unlike the original Mega Man games’ robot-master battles, Mega Man Legends presents Volnutt as an adventurer and archaeologist-like explorer in a 3D action-adventure world. His work leads him to Kattelox Island, where he investigates ruins while confronting the Bonne pirates.
A common mix-up is “Spotter,” one of the listed alternatives. Spotters support Diggers by mapping routes and helping them deal with Reaverbots; Roll fills that role. “Hunter” and “Operator” are not Volnutt’s canonical occupation in this game.