Her third promotion grants Charge!, letting her charge up to melee range against an enemy and take a shot that isn't affected by cover. For enemies? The nanites act like either poison or acid, albeit with no initial damage - it only applies the Damage over Time and debuff status effects to affected targets. Nanite Smoker replaces any smoke grenades UMP45 carries, with specialized nanite grenades that acts like smoke for friendly and civilian targets. Suppression Doll upgrades Heads Down so it cooldowns faster, and can now roll for grazing damage against affected targets.
Her second promotion is a choice between Suppression Doll and Nanite Smoker. However, its damage and chance to hit are reduced, as its real tactical utility is that it forcefully bumps down the timeline positions of any enemy she shoots at from the breach point, enabling Chimera Squad to act after each other for the first round.
Her first promotion grants her Tactical Reactions, which is a breach version of Faceoff. It uses far much more ammo compared to Pindown, however. Heads Down - a cone-based version of Terminal's Pindown, Heads Down has the same effect as Pindown, except it can apply to multiple enemies at a time. UMP45's takedown, when utilized on machines, lets her to use her EW module to stun them for a turn. This perk also provides her with her Electronic Warfare Module, enabling her to hack open doors. In addition, she gets an additional charge once she's Rank 3. UMP45 starts missions with a free smoke grenade that stacks with a smoke grenade item. Or in other words, she's a robot and has the immunities that come with that. AbilitiesUMP45 for those not familiar with GFL, is what they call a T-Doll, or Tactical Doll.