Maggie
As the first Trapper you unlock in Evolve, Maggie has an indispensable tool for tracking the monster: her pet Trapjaw, Daisy. All you have to do is follow Daisy as she leads you straight to the monster itself. The only downside of tracking the monster in such a manner is that Daisy only follows the monster’s tracks. Considering that the monster moves much faster than the hunters, this means that it’ll take you quite some time before you finally catch up with it. During that time, the monster will have plenty of opportunities to feed and stage up. Still, the trapjaw is definitely useful for any novice Trapper with little experience in hunting the monster.
Daisy isn’t only useful for tracking down the monster; she can help to revive incapacitated hunters. You’ll find that this comes in especially handy when your medic is too preoccupied to get to downed hunters.
Maggie is also equipped with Harpoon Mines that can be laid around the field to hamper the monster’s movement. Ideally, you should set them up right after you’ve released the mobile arena. Once the monster has been trapped within the dome, Maggie can set up five Harpoon Mines near the monster to limit its mobility. Sure, the monster can free itself from the harpoons with a quick swipe, but the couple of seconds it takes to break the trap could create a window of opportunity for your hunters to attack. Be sure to pay attention to how many traps the monster has broken so you can proceed to set them up again.
For her own self-defense, Maggie has a Machine Pistol that deals pretty decent damage to the monster. However, as a Trapper, your focus should be more on setting up those traps and staying alive because the mobile arena goes the down the second you’ve been incapacitated by the monster.