A Safety
Not a joke. You have to carry weapons. You might get killed. You might not get paid. And if you go time traveling with someone who only did it once before? Good luck
'I went time traveling with a guy who only did it once before. I got stuck in the past.', @TimeTraveller
'Safety is not a joke. I got hit by a sword.', @WeaponMaster
'I came back from an operation. I got paid, but I was covered in blood.', @SafetyGuy