I have not seen this posted anywhere, (which is insane since this game mode is entirely esoteric) so I have created this list to help players better select their character. These perks can not be viewed outside of a match, and are only visible at the beginning of one or during a character change.
Kait Diaz & Swarm Hunter
Passives:
Improved Speed: Movement speed is increased.
Bonus Elimination for Executions
Loadout: Smoke Grenade, Hammerburst, Talon Pistol.
Upgrades: Boltok Pistol, Torque Bow, Incendiary Grenade
Del Walker, JD Fenix, & Swarm Drone
Passives:
Improved Mark : Spot Enemies who damage you.Enemies you spot reward health to killer.
Bonus Elimination for Multikkills.
Loadout: Flashbang, Lancer, Snub Pistol
Upgrades: random weapon
Marcus Fenix & The Speaker
Passives:
Blood for Bullets: Receive health for damage dealt.
Bonus Elimination for Multikkills.
Loadout: Flashbang, Lancer, Snub Pistol
Upgrades:: Retro Lancer, Frag Grenade, Claw
Fahz Chutani & Swarm Sniper
Passives:
No Flinching: Immune to flinching when aiming down sights and fully scoped
Bonus Eliminations for Headshot kills.
Loadout: Flashbang, Lancer, Talon Pistol
Upgrades: Boltok Pistol, Markza, Longshot
Jeremiah Keegan, Terminator, & Scion
Passives:
Stim: Receive Stim for kills.
Bonus Eliminations for Multikills
Loadout: Smoke Grenade, Hammerburst, Talon Pistol
Upgrades: Buzzkill, Mulcher, RL-4 Salvo
Lahni Kaliso & Swarm Grenadier
Passives:
Improved Cover Slide: Cover slide speed and distance increased.
Bonus Eliminations for Executions.
Loadout: Smoke Grenade, Enforcer, Snub Pistol
Upgrades: Shock Grenade,Gnasher, Breaker Mace
Leslie Mac Macallister, Sarah Connor, & Swarm Imago
Passives:
Thick skin: Explosive damage taken reduced.
Bonus Elimination for Explosive kills
Loadout: Flashbang, Enforcer, Snub
Upgrades: Shock Grenade, Lancer GL, Boomshot
Cog Gear & General Raam
Passives:
Blood for Bullets: Receive health for damage dealt.
Bonus Elimination for Multikills.
Loadout: Smoke Grenade, Lancer, Talon Pistol
Upgrades: Retro Lancer, random weapon, Claw
Elizabeth “Lizzie” Carmine
Passives:
Hot Footed: Taking damage makes you move faster for a brief time.
Bonus Elimination for Multikills.
Loadout: Smoke Grenade, Lancer, Talon Pistol
Upgrades: Shock Grenade, Gnasher, Dropshot
Damon Baird & Locust Drone
Passives:
DB Specialist: Significantly reduced recoil on DeeBee weapons
Bonus Elimination for Multikills.
Loadout: Flashbang, Enforcer, Snub Pistol
Upgrades: Shock Grenade, Overkill, Embar
DeeBee & Warden
Passives:
XRay Vision, See nearby enemies through walls.
Bonus Elimination for Executions.
Loadout: Smoke Grenade, Lancer, Talon Pistol,
Upgrades: Boltok Pistol, Overkill, Breaker Mace
Krav Jarmad
Passives:
Hard headed: Headshot damage reduction.
Bonus Elimination for Multikills.
Loadout: Flashbang, Retro Lancer, Snub Pistol
Upgrades: Ammo, Mulcher, Torque Bow