Her skill is kinda neat, but ultimately, you're not going to get much mileage out of making 2~3* dolls better. Cool tiles though, I guess.

She looks like a discount STAR-chan, although it's hard to describe anything that uses a stupidly expensive round like the 5.7 as a discount anything. She has a three second long cooldown and the skill lasts for two seconds. Her big thing is that she can also buff SMGs. She can be used either a mild firepower buff or an actually not awful evasion buff, the downside of which being that getting her evasion buff to work requires moving your dolls around.

OK, your mileage may vary a lot for this one. Her Armor isn't great and she herself isn't exactly super tanky without her skill up. On the other hand, her skill might buff your other shotgun(s), so it may be useful for that.

Supernova is a shotgun pretending to be a handgun to go along with her shipmate GSh-18. She’s one of the most supportive shotguns available and she enables some real dumb stuff. You want to use MGs at night? Well, her skill allows for that. Do you need a little more defensive capability for your shotguns? She brings that too, all in a kancolle-flavoured package. Honestly, she’s not an automatic pick on every team. You’re likely going to have to drop a MG in your formation to make use of her fully, which can be an issue.

Her two main draws are her movement speed and her MG buffs. Her roller skates allow her to go almost as fast as a handgun, but not quite. Not much else to say about that, but main reason to take her is the MG buffs she provides.

While crit rate is nice, the accuracy buff she provides to MGs is fixed. This means that MGs are entirely usable at night. It bypasses the accuracy penalty that you would normally have with no PEQ. While not the most relevant thing currently, you definitely want to have Supernova in your back pocket for the future.

Props for accuracy. She spends the animoo's story just living in the dorms and only coming out for tests or really weird situations where they cant spare bodies, and she's basically the same in the game - she'll be in your dorms a whole lot. She also has three unique items that affect her passive but otherwise all do the exact same thing. She isn't completely useless, but there's not much reason to pick her over other MGs that don't have finnicky mechanics, because you frankly will not need that many MGs anymore.

She actually gets some fairly hefty stat increases in her mod, with Mod 2 hitting as much FP as M2HB. The issues that 2 stars normally face (low skill values compared to higher ones, etc.) are pretty solved thanks to being upgraded to a 4 star, and it also gives her extra base ammo which helps out a lot. Overall a cheap mod to get, and honestly you get a fair bit of value off even just Mod 1.

She's pretty much an all-rounder MG, and with the Mod 2 skill, technically you're not limited to just SGs, but uh... the shield values are so low otherwise that it only really helps armored things, though I guess some people might find a use for that anyway. MATH BIT: Her Special Equip actually isn't awful, but tbh you're better off with an EOTech in most cases.

Her original form can be found here.

Very good buffs, not good in her own stats though. Skill is blah-ish but serviceable at night. When she gets to MOD3, however. Becomes COMMISSAR NAGANT. May or may not land you in jail (or gulag as the case may be). She does say it herself afterall, about your odd taste...

Her mod form is here

aka G17 ingame; Used to be decent when you actually needed evasion buffs, but who needs that in current year?

Catgirl nuns should be met with fire. Honestly has some use but.. you are likely better off with someone else, due to her aura shape forcing you to push her to the side to give your tanks evade and kind of unflattering aura in general compared to other 4*s. Probably better as cores but she does have her uses. For example, combined with Welrod and Makarov, the +evade/-acc combo does funny things to enemy hitrates (though its impossible to reduce hitchance to zero). Niche, but you may find some use for such things.

Welrodski! ...By which I mean she's basically Welrod but 3 star, with lower numbers and an aura that wants her in the middle (or front works too). Usable if you lack Welrod and honestly not actually bad, but HG builds are cheap and she's pretty common so she might get annoying to get eventually. Also her -acc skill stacks with Welrod, and can be combined with a +evade skill for silliness.

Her mod has other uses and is quite interesting, see her mod entry here

+90% Acc Buff aura at 5-links. Also has a +damage up but that's just icing on the weird, underwater-themed cake. With NV equipment, allows you to completely destroy scouts in night battles if you're actually desperate for that. Normally not a buff I recommend, but she actually gives a lot of it so if you're wanting an actual acc buffer, she'll be 1 of the ones you want. Not as important anymore since there will be other sources of acc boost, but... sometimes you might want something?

I really want to say something good but the closest thing to a real merit that I can think of is "voiced by Ayako Kawasumi." She's basically a 3 star inferior version of P7 with an... "interesting" shape buff and less used than the cat nun. You are likely to be flooded with cat nuns in your eventual quest for Stetchkin. Also, sends you to jail.

....She has tank stats on a handgun with buff tiles that want her in the back. I'm not entirely sure why anyone thought this was a good idea.

Honestly would be fodder but she has a decent enough tileset if you're lacking in HGs with FP boost. Gets considerably better in her mod form, which improves her tiles immensely.

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.