Ben's character is somewhat close to Edward Buck from Halo 3: ODST and Halo 5: Guardians. He's serious when he needs to be, but also throws little bits of humor in where approriate. Although his characteristics are closer to Buck's, I'd like him to have a voice similar to Fred-104. That's a deep, low-pitch voice.

EDIT: In the first and second lines, Ben is talking Michael, asking about the base and then giving his ETA. So his voice is collected, calm, and ready. In the third line, Ben is talking to Jay after Jay brutally kills the Rebel Leader, so he's slightly afraid, but not a lot because he knows Jay wouldn't hurt him and still speaks clearly.