I think each merc should have it’s own signature hand weapon that behaves differently dependent on what it is. What I mean by behavior is proxy’s bat is still a knife how about charging it up and swinging it?
Some off the cuff ideas are.
Sawbones has a electric bonesaw that works like a quake gauntlet (quick knife uses defib).
Thunder has a shock baton that a charged heavy attack causes well a shock.
Phantom has a instagib back attack when cloaked with a garrote.
BBQ could have a pointed cattlebrand (with a flame motif) that you can heat up for extra damage.
Aimee could have a ballistic knife like in call of duty.
Valise Could have the throwing knife.
T-rat could have a bowie Kinfe that has extra reach.
Please add more ideas people.
Edit more ideas.