Tohru "Bored Sociopath" Adachi - 4.2113 - Actually better than he looks at first glance. Heat Riser - Power Charge - Atom Smasher blows things apart on average, and works as a healer-buster too (though slow). Heat Riser provides better survivability (he's not that undurable, although he could be better). The physical resistance is awesome. Instant death is great (it missed one time out of 5 on my all-girl party...I need to check it again, I guess), and Fear+Ghastly Wail is nice. The durability could be better - if he had 6000 HP, he'd be stronger, but he's good right now - Vorpal Blade 2-shots after that Heat Riser, and against physical fighters, that's all he needs. Back-up elemental is helpful too. Gets better if you don't hold him to this Power Charge-Atom Smasher pattern, or the forced Heat Riser.
Mitsuo "Baby Fetus" Kubo - 4.88334 - Even taken as harsh as possible, that first form probably still has average HP to most. Bomb ruins a lot of people by draining their resources (he'd KILL for this to be enervate, but...what can you do), and the damage itself is solid. The second form is...interesting. The elemental damage sucks, but hey, solid almighty, and can make the Fear-Ghastly Wail combo too! Also, rebuilding the shell is...highly possible. And elongates the battle a lot. A resource drain for most, especially since he has resistance to physicals and almighty, meaning he's best fought by elemental fighters...which he can resist with a Wall in the second form.
Taro "Hippie Jesus" Namatame - 4.8944451 - Yeah. Unless you take levels at like 70 (I see that as unlikely - Heaven doesn't give great experience at all - taking Adachi at higher levels makes more sense, as Magatsu has the highest experience gains in the game, even when you're above their level by a lot, even better than the final dungeon), he's good. The durability is great (2-3x for most normal people or so, I think?), which lets him use Quad Converge - this means his elemental attacks kill in a single hit to most (450 damage to 420 HP), and he reduces all but one of those elements to basically nothing. Considering how uncommon wind is as an element, this is 99% of the time his ideal element. Granted, the Control phases could be...arguably useful - he might just be stuck with his first phase stuff here. Unerring Justice works as a finisher, at least. He also has the Breaks, and SP draining. This makes him far, far better - needs to kill a healer? Nuke the SP, done. Very strong overall, despite what you'd expect from a Delivery Man >_>
Alexia Lynn Elesius - 3.449 - Bleh. Her damage is better than I thought it was, though she's still slow (initiative helps). Her other skills are...of questionable use. I seem to think that anyone with status can probably guard through her status immunity time, or just beat the hell out of her instead. Her durability is ok, at least. Bleh.
Charlton Blunt - 4.711111111 - Fast, Dark Destruction is good, and he breaks physical immunes with BOOK elemental damage. Energy Drain is decent enough as back-up. Durabilty is decent enough. Strong overall, though you'd never realize this in-game >_>
Chelle - 4.711111111 - About the same as Charlton. She's not as fast, less durable, and has no variety, but her damage is better by a lot, so...
Clarissa Arwin - 3.8438 - Man, she hates turn-based conversions. A lot. She's also kind of frail, too. Nonetheless, Rob Turn is good enough to ensure she gets some actions off. God help her if she gets hit first - she's kind of frail, and not so fast she will constantly get a chance to do this (and her damage isn't great without Sacrifice)
Felius Arwin - 3.366 - A lot better than I used to think. Physically durable, not too slow, and Disarm is relatively winning. Damage is also solid. Really straightforward, but a lot better than he looks at first glance.
Labyrintha Woodsworth - 2.777 - Lightning is void-aligned to me. NULLS JOGURT DAMAGE!!! Otherwise, kind of slow, damage is good, Attack and Aim Down is awesome, Weapon Block may help, but...durability is not good (could be worse, at least).
Levin Brenton - 4.477 - Mmm...durability is relatively close to average, speed is great, Cancel Strike is good and not innaccurate (better than Rob Turn overall, to me, and running of Levin's better offense and speed), and he has magical back-up that's decent. Good damage, too!
Ragnar Blitz Lebrett - 4.4999999999 - Uh...yeah. Awesome damage, but the mini-Predator Barrage, also used as a counter, with Hyper Attack, awesome evasion, good durability, good speed...yeah. Pretty awesome, and probably the best overall fighter in the non-boss cast.
Rupert Drandridge - 4.5666 - Mmm...not as super fast as you'd think at first glance. Maximum Risk is good, though his durability is relatively ok (on par with Chelle) only, and his accuracy is pretty crappy. A decent Godlike, probably.
Tony - 2.555 - Doglike
Weisheit - 4.88997766 - Fast as sin, durability is...worse than Charlton, but could be worse. His damage is brutal, otherwise, and he can get it off. Really good.