Both Maru and Magnus Mango work in the Military career. It's implied that Maru is an insane Sim who likes to talk to his figment of imagination, Mitch. He made everyone surprised when he signed up in the Military as a Grunt, which no one else would. At that time, he also made his cousin Magnus proud when Maru told him he joined the Military, as Magnus works in Military in Aurora Skies as well. There's a street in Sunlit Tides which is named after Mango, which is where Maru lives.