She's basically a 5-star hybrid-type SMG, except she's not exceptional at either role she can do. She's meant to be a sub-tank, where she does not really excel. She's fine for generic use, but not great for high-end stuff.

The first 6 star SMG, and oh boy, she deserves it. As long as the damage isn't so overwhelming that it can kill her dummies outright, she has a chance to negate the damage. The chances increase if the enemy has more debuffs or has Marks of Vengeance on them, which immediately makes her a good pair with M4. Also the Sop doll is cute and comes with weird features. This is literally Sop's fault.

Lower rarity Vector. Has useful evade. Has shit for HP though and lower atk. Can off-tank alright and her molotov is still good enough to use, but you really want better SMGs. Her primary virtue is that you're given a pile of her at the very start.

A weird hybrid tank that... doesn't have a great base evade, but has a fairly powerful self-evade buff with very high uptime.

Her mod adds to that and adds more to her kit. Quite interesting, see her mod entry here

The Night Empress. Unfortunately, she's been going the way of many a monarch with the lower class overthrowing her. She used to be the last word for night battle ARs, but with AS VAL's mod, she has fallen behind. Turns out, being able to use a crit scope at night is very good. That being said, +200% damage at night is still decent and if you can't afford the mod, she's a good replacement.

Also, while enemy armor stacks superhard now, it's actually fine if you have sufficient +FP on your ARs to punch through. If you don't though, this still wont save you.

Has a kind of an unfocused buffs that... kinda sorta benefit things? She doesn't greatly benefit any lineups, really, and you can get more usable 2 star handguns honestly. Can maybe replace the cat nun in the meme Welrod/Makarov/P7 lineup, but people don't actually use that formation seriously for the most part. Really better off as cores.

Maybe one day she'll have a cool mod.

MURRICA. Usable but not as good as Nagant. Has a smoke bomb (unique among handguns) but the %s arent as high due to 2 star.

Her mod has a completely separate entry.

Modded version of M1911

A really expensive trash cleaner.

Basically when she pops smoke, she then goes Alvin York and blasts away 7 times for extra damage, hitting the farthest enemy and working her way closer to the front with every shot. If there are no closer enemies, she just keeps shooting that one until someone else has gotten closer (either because its dead and thus a new thing is closer, or something ran ahead of it).

Note that while the skill has an ICD of 1 second, she doesn't actually start blasting away until 3 seconds in due to the throw animation.