She's a generic login AR. No one cares.

The Steyr ACR is the gun the Pallet Rifles in EVA are based off of, and this one is about as useful. On one hand, it seems like she'd be good for para fairy and its debuffs (you get +25% final damage with that), except it isn't enough to make up for the debuffs still. It's also not very easy to get debuffed. Evaluation may change based on future enemies, but really it's not worth it when you have so many good ARs to choose from.

Known on other servers as 5 cores.

There's so much better now, there's really zero reason why you should run her.

Similar to G41 in performance (actually slightly worse, but not significantly) and the artist just drawing their weird fetishes that land you in jail. She's basically a 5 star equivalent of Tavor sharing the primary weakness of taking 6s to startup instead of 4. The skill is good while active, but YMMV.

Honestly, the issue with any AR outside of the big mod ones, is that they just get gapped so hard unless they have a niche. ART556 does not. So you could use her, but....eh...?

Extra notes available.

She's one of the dolls of all time. Yup.

No, she's not a video tape. One of her skins shows her recent arrival in the US has apparently given her quite the dump truck ass. Must be all the McDonalds. Her skill powers her up with extra stats relative to the enemies she's fighting, meaning she has basically no real use vs. mooks. Potentially handy vs. bosses, but being a RoF-focused AR, she suffers from chips existing.

Suffers from there being a more famous, better M82, also with pink hair.

This one is basically interchangeable with Tavor, who by now isn't nearly as useful because you should be drowning in high-end ARs. If you are not drowning in high-end ARs for some unfathomable reason, well, she isn't the worst thing ever.

Also has a combo skill with AK Alfa if you do the side story stuff, but AK Alfa isn't exactly wowing the charts either.