AKA Type-92.

Good buff coverage area. There are currently only 2 in the game that give that coverage - Type 92 and Contender. Also has the HIGHEST evade buff that can be received. Used for specific stuff, like pairing with SR-3MP.

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.

Aka AAT-52. Between an useless skill and even more useless buff tiles not worth using under any circumstances.

Ablative armor and a grenade. Has a lot of HP for her rarity with a not so terrible evade, though YMMV between her and M38. Her main virtue is that she's the first 3 star you get from the story and they give you a pile of her so it's easy to stock up bodies. Only useful for logistics and cores once you have real tanks. If you happen across free PPS-43s, they're somewhat better.

A high class SMG that you get for free (and even better, starts at lvl90 with 5 links when you get her now) providing well balanced stats, and a very powerful tanking skill. -Enemy ATK power (nevermind her own +evade!) that goes off in the first 3 seconds, makes tanking the initial contact much easier, and is usable even from an off-tank position.

Can easily be a main or off-tank, combos well with UMP45 defensively (though she doesn't offer much for DPS), and passable tile buffs (that doesn't clash with anyone's, but they're not amazing either). Her main weakness is she has very bad uptime (5/12) compared to some other SMGs, but the quick startup and utility (and the fact most fights are short anyway) make up for it.

Did I mention you get her at lvl90 and 5x linked? That's REALLY helpful if you're starting out.