She has very weird mechanics. I want to say something witty but that's really how it works. The most immediately noticeable thing is that her damage is actually cut in half and she fires twice. This seems odd but no, its not just a visual thing either, and both shots actually can end up on different targets. The first shot uses normal RF targeting, while the other has real time targeting to always shoot the farthest target. Vs heavily armoured (enough that AP rounds wont go all the way through) or high HP enemies, this can be bad. Or it can be excellent at trash clear.

Also note that because she shoots twice, it only takes half as many firing cycles as it says on the skill to get stacks, as she gets 2 stacks per cycle (1 per shot). It also has interactions with Sei and Jill that are in the detailed page.

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.

On one hand, she's actually not bad in melee. On the other, she suffers from dumb mechanics (like not being able to switch to melee while reloading, which WOULD HAVE BEEN REALLY NICE). She's not terrible at the role of "melee shotgun" (she's actually quite good at it), but the number of situations where you'd actually want a melee shotgun are quite limited.

The meme potential of a girl with a camera and a smiling face is good enough reason to have her (now that we have multiple secretaries), but she's also not half bad as a combat unit. She gets a shield, and having the shield gives her FP buffs, while losing the shield means she's getting EVA buffs. The uptime is quite good, so she's not a bad side DPS (she has a 69% damage buff at 2 stacks and 119.7% at three stacks) that can sub-in for off-tanking and can even work as a main tank (44% eva at two stacks and 72.8% at 3). The problem is the optimal timing can be a little iffy, but she's alright for AFK fighting since it'll generally be good enough, just not fully optimized. The tradeoff between her and SR-3MP is just uptime vs power.

As expected of the main girl I guess.

Oh, and her tiles are weirdly shaped, but this is not uncommon for off-tank dolls anyway.

She has an SVD so she's... EXACTLY NOTHING LIKE SVD. She's closer to QBU-88, having an AoE effect, but she has self-buffs on top of that and, in some situations, can match and exceed such DPS staples as M14 Mod. Honestly if you're coming out of the event with only one of the girls (besides Henrietta who you get just for doing story), then it really should be Rico. Also remember that her tarot cards are used up BEFORE the active part goes off, so you don't get the passive benefit for the nukey bits.