Godlike
Reicher Wallace (Mana Khemia 2: Fall of Alchemy) vs Myria (Breath of Fire III): Myria probably kills in roughly 6 hits, and she's just shy of a 6-5 so that's five Reicher turns, plus a bunch of timed cards. Reicher should be able to do around 7PCHP damage in that time, which is enough.
Sephiroth (Final Fantasy VII) vs T260G (SaGa Frontier): A bit surprised to be the first vote this way, since gravity is something T2 fears. Sephiroth is faster, and wins with Fly -> Super Nova -> Break. So T2 gets two turns, and the best she can do with them is Hyper Blaster + Magnify which is around 1.3 PC. I definitely see Sephiroth as higher than that. Actually, it's probably even worse, Sephiroth can just open with Wall and tank V-MAX + two Cosmic Raves which is only 1.12 PCHP (assuming T2 can get away with a power-over-speed setup and not eat a double in there, which is not a given).
Heavy
Throné (Octopath Traveler II) vs Myuria Tionysus (Star Ocean: The Last Hope): Throne has pretty good turn 1 damage for an Octopath character, but thar's damning with faint praise, and Myuria wins when she gets a turn since she isn't trying to use physicals.
Sienna (Chained Echoes) vs Strawman (Wizard of Oz: Beyond the Yellow Brick Road): Presumably instant death spam does its thing.
Middle
Estelle Bright (Trails in the Sky FC) vs Red Mage (Final Fantasy V): Doublecasting Toad is always a little risky because two hits is the same as a miss, but Toad + something else (Sleep? Mini? Not sure on Estelle's blocker situation) should be enough.
Chrom (Fire Emblem Awakening) vs Merrin (Fire Emblem Engage): Mostly just copying Snowfire math here.
Light
Lucius (Fire Emblem: The Blazing Blade) vs Canopus Wolph (Tactics Ogre: Let Us Cling Together): Yeah sure, even the Baldur Bow could usually outrange spells iirc, so I'm down for hyping Canopus's range. Canopus honestly might win even without this, since he 2HKOs and Lucius only 3HKOs.