Cloud of Darkness - 4.3 Heavy? FF3j form doesn't really translate like in-game. Crazy evasion/MDef/elemental resistances and good HP, making a crazy durable tank. Problem is the damage is just a 3HKO. Oh well, that level of durability gets you places.
Persona 3: The Journey
EDIT: Full rankings. Since they've got this far, I'd honestly rather contribute to their ranking instead of DNRing and not participating. As a disclaimer: I throw Minato out of the averages entirely. Usually not comfortable with that, but he's way too much of a clusterfuck, to the point that even trying to slap his stats into most averages is a neverending headache.
Aigis - 3.75 Heavy. Lightning weakness is a bitch, but plentiful healing+Orgia Mode is a winning combo. Buffs aren't much of a thing, the only one she truly has uses for is Tarukaja, but that+Orgia gets her to juuuuuuuust scrape that OHKO on average pdur. EDIT: So I guess that she's at least good enough for a Middle championship. I guess this pokes her into the border.
Akihiko Sanada - 3.25 Middle. Pretty run-of-the-mill as far as duellers go. Ice weakness is problematic, but Lightning immunity is pretty cool. The debuffs, once again, aren't great. Rakunda could be the difference between a 2HKO and a 3HKO, but the fact that it runs out in three turns and doesn't have that much of an effect makes it mostly moot.
Chidori Yoshino - 2.0 Light - Oh boy, 50% HP range one-shot (not as in per battle, but per casting) physical reflection on a boss with 0.4x PC HP and crappy first-turn speed! The skillset is actually fairly large (ID, debuffs, watchamacallit), but the meat of it is unlocked at low HP ranges, and the durability... sheesh. Try again when you're not borderline OHKOed by average damage, Chidori. At least, the fire immunity lets her... um... er... IT LETS HER WALL... UM... S4 EUGENE!? Yeah no.
Jin Shirato - 3.0 Middle. He -lives and dies- by his status of fail hit rates. Honestly, his damage is so awful and his effective durability is so close to PC HP (still 3HKOed by average? Yeah) that... uh... it's not much help. Charm is awesome when it connects, but that takes three turns and he loses initiative in general. Not to mention it only lasts three turns, and Jin awesomely 5HKOs. So, even when he connects Charm, he isn't guaranteed to win. He needs to be at below 50% HP to actually manage a kill before it runs out (Mudoon/Hamaon). And god help him if he faces status resistance/godly MDef, because he's not connecting any status ever then. At least, he immunes three elements, which gives him spoiling power. This is the only thing keeping him from rotting in Light definitely to me. Granted, the whole mass of failure stacking up sorta makes him neat in a bizarre way, but that's because even with the status being awesome when it connects, he fails so badly at capitalizing that... yeah.
Junpei Iori - 3.1 Middle. Honestly, he's just very middle-ground. His actual offense costs him HP (which can be hefty) and his backup sorta sucks. On the other hand, High Counter + regen actually makes him pretty okay against Middle fighters, and the fire immunity is cool. Wind is a weakness he doesn't face often, so he's well off there. Not exactly a winning Middle (he eats it to healers something fierce due to his lacking pressure and HP-eating non-fail offense), but hey. He's a better dueller than Yukari, I guess.
Ken Amada - 3.5 Middle. Um, Ken's heal-locked too often? He's not even too terribly close to 2HKOed by average, 91% PC HP and P3 defensive stats have a menial effect on durability (see my 52 Armor/near gameworst Endurance Yukari taking like 5 more damage from an attack than Minato with armor 56 points stronger and superior personas on Endurance by endgame. Defensive stats seem to take a definite third-fiddle to levels, not to mention the stat curve itself is small). Damage is poor, but healing and ID is a winning combo. If his ID was turn 1 instead of turn 2, he'd be a Heavy. Hates a lot of ID whores, though, due to the Darkness weakness. Granted, he also mocks Holy-reliant people, so hey. Oh, by the way: he has a storebought non-random Charm weapon. That's probably not exactly useful, but may work against some ID-immune healers in Middle? Iunno.
Koromaru - 3.4 Middle. Fire reliance for slugfesting isn't nice (Koro -can- null Fire resistance, but he lacks healing, meaning that isn't always a turn he can afford), but walling both Fire and most magical ID under my views is nice - not to mention the minor physical spoiling. Good HP and turn two ID round him up. He's a lot like Gale, but superior in a fair amount of areas (more durability, a less commonly walled element, a high 3HKO instead of a low 3HKO...). Solid, really, but not a champion-level dueller or anything.
Mitsuru Kirijo - 3.25 Middle. The Fire weakness fucking sucks. Mitsuru could actually swing Heavy if it wasn't
for that, but the fact she gets reamed by the likes of Stahn Aileron... man. Spoiling vulnerability from hell drops her over half a point. She spoils herself, and has a solid damage/healing/buffing game going on her favor (made better since Mind Charge doesn't get spent until you actually cast a damage spell. This means she can heal-lock with physical+Mind Charge'd Bufudyne if need be, say), but damn, the weakness.
Shinjiro Aragaki - 3.65 Middle. Power Charge => God Hand => 2.8x average damage. This off someone who actually has okay durability due to his regen, and the occasional physical reflection could at worst let him win tiebreaks. Can't heal-lock as well as Mitsuru, but not having a single weakness to exploit helps. Granted, can't spoil, and he pretty much hates physical tanks and evasion whores. But that's a winning strategy, and he's quite possibly champ-powered.
Takaya Sakaki - 3.15 Middle. The durability is... okay, not godly or anything. Effective 1.7x PC HP is fine, but not a real prize winner. Then, Takaya can't really kill in two turns - he horribly struggles to 3HKO as is, and god help his soul, once again, if he faces high-profile MDef and EDIT: HE CAN'T USE THE ID? FAILFAILFAIL. Man, this makes him borderline Junpei-tastic. Because being walled by Bernadette wasn't bad enough, he also has to eat it to healers that don't get 2HKOed by average magic damage something fierce.
Yukari Takeba - 2.7 Light. Lightning weakness, as usual, sucks. But she has a lot of healing and juuuuuuuuuuuust avoids that 2HKO against average damage. Wind blocking is sorta useless, and she's just... not impressive in most ways other than having a fairly deep reservoir of full healing.