I don't know anything about black lagoon, so let's go with a rundown on motoko:
Firstoff, she's fucking hot.
Fully cyberized- coumpterized brain, mechanized body. Super strength and durability goes with this- able to fire weapons with one arm that wouldn't be safe for a normal human to be NEAR when they fired, such as the artillery piece made for a mech used in the episode where she gets her arm ripped off. Extremely accurate, super agility- able to jump and perform acrobatic attacks and manuevers with extreme precision and speed. Well trained in martial arts, including holds and striking. Able to uplink with her team and utilize information they collect or deduce, gathering intel even during combat.
Cunning, too. versed in deception, tactics, politics, and diplomacy. Uses both logic and instinct.
Cybernetic body allows other performance factors: able to turn off pain receptors, safely fall from extreme heights, and lift extremely heavy objects.
Weapons expert, favorite weapon is the Seburo C-26A, a low-power, high-accuracy SMG with deep magazines- similar in function and appearance to, and probably based off of, the P-90 bullpup. Has also been seen wielding Seburo K-1C 9mm semi-auto pistol, and as a black ops agent is trained with various weapons of various models and designs, efficiency can be assumed for any millitary projectile weapon. She also Has a knowledge of the application and recognition of these weapons.
She has been shown to have accuracy and reflexes superior to that of an expert sniper with the C-26A, enough to allow her to shoot down an incoming similar-caliber bullet at close range.