Passive Effect
Whenever Swift hits an enemies weakspot, her shots ignore 150 DEF.
Swift also gains +1 Magazine Capacity.
If Marian shoots ADS, the target is marked for 2s, which causes her next standard skill shot to automatically lock onto the marked target.
The mark is removed when Swift actually uses her standard skill to shoot the target.
Standard Skill
Swift shoots the target, which marks the target for 3s.
The mark causes Marian's next hipfire shot to automatically lock onto the target.
The mark is removed when the shot fires.
This skill has charges that allow it to be used back-to-back. The default is 2 charges, or 3 with its first Neuronic buff.
This skills shot functions similarly to a regular shot - it can crit, hit weakspots, deals double damage to shields, and uses 1 round from her magazine, but it isn't technically a ballistic shot - it's a skill. This means it doesn't benefit from things like per-shot aptitude buffs (E.g. from Fritia - Little Sunshine).
With the skills second Neuronic, it benefits from hipfire ballistic damage buffs, but is still technically a skill, not a shot.
This skill has a low S-Energy cost of 4, and a low 5s cooldown per charge, making it highly spammable, but given the high rate Swift ideally needs to spam it at, it's not low enough to actually be used continuously.
Note that this skill deals notably less damage than one of Swift's regular shots.
Ultimate Skill
Marian shoots a shot at the target that deals kinetic damage and knocks back all targets along its path.
The shot also interrupts the targets special skills for 10s.
With its first Neuronic buff, the shot also causes Marian's regular attacks and her standard skill to ignore 20% of the targets DEF for 10s, which is a good damage buff.
With its second Neuronics buff, her ult fully reloads her magazine.
With her 5* weapon this isn't overly useful, but without her 5* weapon this is a nice sustain buff.
Support Skill
Swift's Support Skill causes Marian to leap backwards and fire a shot at the target that deals kinetic damage and knocks back all targets along its path.
The shot also interrupts the targets special skills for 8s.
The damage is meh, but if you can hit a lot of targets with it then it can potentially deal good damage. That's obviously unreliable though.
Dealing variable but usually poor damage whilst offering no support functionality means that, like all main dps operatives, you don't want to use Swift as a support operative.