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.

The mightiest Alpaca to ever wield a machine gun. Don't ask. I don't want to have to explain KR server memes.

With all of the newer MGs she's just okay. Not bad. Just okay. May find a use for her, but eh. Maybe if she ever gets a mod...

Given the skill, one might be tempted to treat her like a normal AR with hilarious early burst damage, but you'd be dumb to do so, because she doesn't get buffs from SMGs and other sources that buff ARs. Also her crit rate is the usual garbage 5% MGs usually get instead of the much better AR rates, and she can't equip PEQs.

That said, she can be a fun mix if you, say, happen to need AR formations to punch through armour (because she can use the absolutely bonkers MG unique ammo types)