Ceodore (TAY) vs Zeromus (FF4): Yeah, I think Zeromus is good enough to handle this style of fight.
Ceodore vs Fei (XG): Image is pretty terrible against Deathblows actually; the weak opening hits kill it off. Anyway, Fei heallocks.
Ceodore vs Lamington (Disgaea): Image is a pretty good lockdown here. Lamington has magic but it's seriously not very good. Ceodore does have to heal and recast Image moderately often but kneejerk is he can handle it.
Ceodore vs Feena (G1): Yeah, lightning resistance is most likely legal... lots of ways to get it.
Ceodore vs Ursula (BoF4): Haste then Reflect, with one shot of Awakening to pull him through? Yeah, sounds right.
Ceodore vs Sabin (FF6): Bum Rush isn't a good enough 2HKO to really overwhelm Ceodore; he only rarely has to heal twice per Sabin turn and doubles pretty often with Haste, so yeah.
Ceodore vs Lang (LoL2): Ceodore breaks past limits with what exactly? Lang has that 10% regen to make things worse. He also does loads of Image-piercing damage to keep Ceodore on the defensive while adding various ~15% status.
Ceodore vs Sofia (DQ4): Not sure what I think of Ceodore immuning sleep, and I imagine the fight hinges on that? Abstain.
Ceodore vs Alex (Lunar:SSSC): 2 Vigour Sword Dance is a shutdown like Yamikei, but it does run out of MP eventually. But... does a "Ceodore fails to double" happen first? Likely, he's notably below average while spamming Curaga.
Ceodore vs Kika (S4): Kika doesn't quite manage the shutdown heallock, but Ceodore does have to heal three times for every two times she gets it off and she's fast.
Ceodore vs Cthulhu (CSTW): Cthulhu goes first, drives Ceodore insane. He now OHKOs most likely, and has Insane Death active. Ceodore needs to haste and image but Cthulhu is too fast for him to get both off in time. Ceodore really wishes Haste didn't have that charge time for fights like this. Though I suspect he might lose this one anyway.
Ceodore vs Edna (SH3): Ceodore goes first and uses Haste, Edna Mental Breaks him twice to get that to stick. Edna doesn't quite heal-lock him due to ice resistance, so Ceo's best bet is to heal every other turn while getting in attacks. Of course, Mental Break means he can't do this for very long. I think he can just pull it off, though... it helps that he has that one final Awakening once he runs out of MP.
Estelle (Trails) vs Zeromus (FF4): The turns probably come too quickly. Zeromus 3HKOs and probably isn't too far from a 3-2.
Estelle vs Fei (XG): I suppose you could talk me out of allowing Yamikei. Not today, though. Fei 2HKOs and can survive one Estelle turn.
Estelle vs Lamington (Disgaea): Also heal locks.
Estelle vs Feena (G1): Time Gate does its thing.
Estelle vs Ursula (BoF4): One round win.
Estelle vs Sabin (FF6): One round win.
Estelle vs Lang (LoL2): Estelle has serious trouble chipping Lang down (that regen, and he can resist ice) so her only hope is 200 CP... and yeah, that doesn't OHKO thanks to Lang HP. Never mind he can probably mess with her before then (speed, status).
Estelle vs Sofia (DQ4): Deeper resources.
Estelle vs Alex (Lunar:SSSC): Another annoying tanky regen fighter.
Estelle vs Kika (S4): Estelle barely misses the OHKO.
Estelle vs Cthulhu (CSTW): See Snowfire, add respect for Cthulhu's speed so that double happens reasonably quickly.
Estelle vs Edna (SH3): 2HKOs easily enough.
Knight (FF1) vs Zeromus (FF4): Zeromus' damage to full-HP knight is a wonderful joke, like a 12HKO or something with Bio so he goes for Big Bang instead, low 3HKO every other turn. Once below half HP he gets a 4HKO every turn. Knight meanwhile just 4HKOs. I think Zeromus still has this, but barely. If Knight could somehow hold his damage to avoid putting Zeromus below half HP after the second strike he'd win easily. He also wins if Zeromus has less than a 4-3 but I doubt that.
Knight vs Fei (XG): Fei puts up Counter Force, then starts pounding with Yamikei. Knight has a 3HKO on him but misses half the time. Fei can keep up with that with INNER HEALING. He's a better physical spoiler in Heavy than I figured.
Knight vs Lamington (Disgaea): Resisting ice and physicals is grand, but Lamington's still very tanky and Armageddon probably manages a 5HKO (could be argued into 6, but counters help so meh).
Knight vs Feena (G1): Thunder resistance.
Knight vs Ursula (BoF4): Ursula generally has issues in Heavy. I guess she can try for some status nonsense here but eh.
Knight vs Sabin (FF6): 2HKOs, isn't 2HKOed.
Knight vs Lang (LoL2): Someone else who can't avoid a Mystic Art.
Knight vs Sofia (DQ4): Can avoid the 2HKO and hence slowly outslug.
Knight vs Alex (Lunar:SSSC): Regen, healing, Sword Dance eventually brings Knight down. I -think- Alex has the resources for this anyway.
Knight vs Kika (S4): Kika... manages a 5HKO? That's impressive. Knight 2HKOs her, but Kika does have good evade. Not good enough to dodge 3 out of 4, though.
Knight vs Cthulhu (CSTW): At base, Cthulhu does 18% while Knight does 32%. Cthulhu doesn't like those numbers, so he uses Dark Strike, doing 7% and making his own subsequent damage 40% while Knight does 38%. Hm... still can't win with those numbers outright. But Drain Strike fully heals so he can buy himself time.
Knight vs Edna (SH3): Edna 4HKOs with Black Hole and has some laughably worthless doubles. Knight probably 3HKOs. I don't think Edna gets her fourth turn before Knight gets his third, though it is close.
Ceodore 5-6
Knight 5-6
Estelle 2-10 (has very little answer to durable Heavies who can heal-lock her, which is quite a lot of 'em)
Zeromus, Fei, Lang, Alex, Cthulhu: 3-0
Sofia: 2-0
Lamington, Kika: 2-1
Feena, Edna: 1-2
Ursula, Sabin: 0-3