FN-2199, also known as "Nines", is a riot trooper who spotted a former comrade, being Finn killing one of his fellow troopers, he then shouted "Traitor!" and began to attack Finn, but was then shot by Han Solo. A novel showed that Nines was part of Finn's squad in the First Order.
Powers and Stats
Tier: 9-A physically. 9-A with blasters. High 8-C with heavy weapons and explosives
Name: FN-2199, "Nines"
Origin: Star Wars
Age: Early to mid 20s (roughly the same age as Finn)
Classification: First Order Riot Trooper
Attack Potency: Small Building level physically (Comparable to FN-2187 and was capable of sparring evenly against him during training session under Phasma, later fought mostly evenly against "Finn" while he was wielding a lightsaber and even managed to overpower him). Small Building level with blasters (The standard issue F-11D blaster rifles of the First Order Stormtroopers pack similar firepower to the E-11 and DC-15S on which they are based). Large Building level+ with heavy weapons and explosives.
Speed: At least Peak Human
Lifting Strength: Likely Peak Human
Striking Strength: Small Building Class (Overpowered Finn using a riot baton and sent him flying back a few metres with a well placed blow, causing Finn visible agony)
Durability: Small Building level without armor (Roughly comparable to Finn physically). Armour is probably Small Building level against physical strikes (Captain Phasma noted that even a Wookiee would be hard pressed to break First Order Stormtrooper armor) and Small Building level against directed energy weapons (Undersuit and armor plating are made of a composite plastoid which can disperse or absorb the energy of one blaster bolt hit which can result in the wearer being knocked out but still alive)
Stamina: Likely Peak Human (roughly physically equal to Finn)
Range: Extended melee range with riot control baton. Tens of metres with blaster pistol and grenades. Hundreds of meters with blaster rifle.
Standard Equipment: F-11D blaster rifle, SE-44C blaster pistol, Z6 riot control baton
Intelligence: Highly trained soldier and skilled fighter overall. Otherwise average intelligence.
Weaknesses: None notable