Quite useful, but not great on her own. Her own DPS isn't especially impressive for an MG, but she can give a decent amount of extra ammo to other MGs, which can be worth it or not depending on who you pair her with, in addition to giving shotguns extra armor.

A doll that was forgotten for so long I couldn't find a cleaned up version of her image outside of moegirl.

Her skill does different things depending on whether its a day or night battle. Crit and Damage during the day, Hit and RoF at night.

She's not actually bad, just that she's not exactly overwhelming good, so she just... kinda exists?

And then Shattered Connexion happened and she was helpful against a certain enemy type, but that's far in the future. For now, eh... raise or don't raise, whatever, you'll be fine either way.