Err
Pot/Jar Snail Girl - has some magic, but seems completely immobile. That is a bit of a problem in a war, as armies are famously known for moving. D tier, could maybe be some kind of artillery if her jar is carried by some other guy but otherwise no.
Tree Girl - Same problem as before, but she also can’t attack or do anything except look pretty and provide food. Well, actually, that could be useful, assuming she can replenish those fruit at a reasonable rate - this would provide a source of food for the soldiers. Unfortunately with those roots it’s even less likely that she can keep up with the rest of the army. F tier.
Half-Fish Girl - she might be able to slither around, but 1) if she’s anything like real fish she is more likely to just flop around and her muscles aren’t built for slithering, and 2) if she has gills, we clearly have an issue with any land based combat. That trident does not seem aerodynamic but we can at least replace that with a standard issue javelin. C tier, could be a useful unit during sea combat.
Scythe Demon Girl - looks very good, high mobility, reflexes, also possible item warping/summoning and teleportation abilities. The only problem is that she seems easily distracted by blowing kisses at enemy soldiers, but this can be eradicated with enough discipline. I’ll give her an A tier.
Scorpion Girl - at least she can walk, that’s more than many previous girls, even if her mobility seems a little low. Her upper body seems like a weak point as the rest of her body appears naturally armored, but some specific armor sets could help offset that. Would be valuable as a slower, but high-breakthrough formation. B tier.
Slime Girl - I think consuming one’s enemies breaks the Geneva conventions somewhere. F tier.
Er, Water Slime Girl - Would be very useful due to her intangible liquid nature as well as natural weaponry, which means that she can serve in the army without basically any spending on equipment and weapons - and is likely quite difficult to kill. A tier.
Purple Haired Girl - doesn’t seem to do anything, just cheers on the rest? I’ll give her a D tier.
Bat Girl - several useful abilities, like warping/teleportation, bat transformation, and natural weaponry. However the Scythe Demon Girl fulfills the same niche and is far more mobile and seems to have better reflexes. B tier.
Ghost Girl - Assuming she phases through anything physical and can summon her giant evil faces basically anywhere, that’s an immediate S tier to me. You can’t really fight back against that, strong armor doesn’t help against this kind of attack either. You could deploy one and she would eventually win.