Prototype Gear (Wild ARMs 4) vs Caineghis (Fire Emblem: Radiant Dawn)
I'm skeptical of assuming "line attack = no counters," because I believe Tide mentioned that Jude can theoretically counter Boss Kresnik's Circular Volley. And Caineghis can counter melee-range magic, especially when it has damage attached when the ID misses. Anyway, since most people assume fights start at melee range, it's move-> Radious Breath to avoid a counter, tank a single Cain hit, then move-> 2 more Breaths. Which is still enough.
Cidolfas Orlandu (Final Fantasy Tactics) vs False Althena (Lunar: Eternal Blue)
Heavy
Vanille (Final Fantasy XIII) vs Delita Hyral (Final Fantasy Tactics)
No equip change, and as noted equip change Delita is at best coinflip anyway.
Middle
Fina (Skies of Arcadia) vs Sceptile (Pokémon)
Sceptile barely, *barely* 2HKOs Fina from the stat topic (but maybe the damage average is with crits baked in, which would imply Sceptile's damage should use the average damage as well, in which case Sceptile's 2HKO is cleaner). Sure he can get a crit, but Fina's Stone can hit on turn 1, too. Anyway, faster 2HKO is enough for me.
Caina (Wild ARMs 2) vs Ray Raigh?? (Fire Emblem: The Sealed Sword)
Elf: So... is Caina weak to something else ("weak to dirks"), or was the stat topic entry just plain wrong?
EDIT: Sure I'll buy doubling hype, didn't realize Caina was quite that slow.
Albert Serdio (Legend of Dragoon) vs Natalia Luzu Kimlasca-Lanvaldear (Tales of the Abyss)
Zegai (Suikoden V) vs Lufia (Lufia and the Fortress of Doom)
I don't normally vote Lufia 1, but surely. Zegai doesn't need a OHKO although he might have it anyway, Lufia's healing is terrible and her pressure is non-existent after the elemental walling nonsense.
Light
Jogurt (Shining Force) vs Sheena Fujibayashi (Tales of Symphonia)
Raticate (Pokémon) vs Zieg Feld (Legend of Dragoon)
Bard (Final Fantasy V) vs Viki (Suikoden Series)
Didn't know Viki4's Blinking Rune actually acted as ID... and don't really care, lala Suiko4 doesn't exist. That said, I think Viki5 wins here unless regen was more badass than I think - she just Yellow Scarves up status halving, and with Bard's stop lasting 2.8 turns (and Confuse lasting uh ~2 turns), Bard isn't really gaining TOO much time for regen hype. According to the stat topic, Viki5's Set! 3.23 HKOs average, or 2.93 HKOs the frail Bard (mentioning the decimals due to regen). PLUS Viki5 can randomly chain magic out 2 Set!s. It seems very easy given 9 shots of Set! for Viki to randomly get Chain Magic -> resist a turn of status -> deadly 3HKO if regen is bad enough.
I'll switch my vote if FF5 regen is more badass than expected. (EDIT: And Chain Magic was more badass than I was assuming above anyway, so never mind, see below, ~55% trigger rate.)