No run allowed, I learned in GoS it takes more time trying to run than actually finishing a battle, auto-attacking was faster for me than running, sadly this game doesn't have this option, I am guessing the spawn rate for the Kantei may be a little higher on the castle area as the Kirin is not part of the enemy pool, it only spawns on the dream sections.
I already acquired it, I did notice the number when I tried to catch the Lesser Demon, as it requires the same number of defeats, however the spawn was a lot more common.
Marisa's BLAZING STAR: sparks via Meteor Shower, Flash Slash, Mesocyclone, at 50% HP or less while Last Word is active.
Weapon Ability: 20 (Done at 23, 16 isn't enough), on any enemy (Ghosts included)
Apparently it sparks via all POW consuming all-targetting physical skills, it cannot be sparked via Sword Press.
It sparks amazingly fast when the conditions are met, I wouldn't be surprised if there is a perfect success rate at a lower HP rate, in GoS the maximum Last Word Activation was about 18% when HP was below 75%.
Hopefully somebody missing the skill can give a second confirmation.
Gah..., Saya's Kurahinata Divine Palm is really random, it got it twice via Crusher (Blunt) using both times physical Elemental Skills, Ice Crash confirmed, first on a Gargoyle (2nd Turn, Last Word active) then on a Ghost quite fast, however I can't reproduce it.
If it's something like a counter it will take a while to figure, as in Saya's action must go after an enemy targeted her and she gets injured, I don't think there is a very low random spark rate, is just the condition must be mind-boggling, as long as is not related to current Land Power it should be something easy to pay attention.
Both times using Akyuu as a Doppel, her physical last word is a single target instant death skill, apparently neither the Crocea Mors, nor Critical Thrust (Spear Skill) are related or required for sparking, somehow I would have expected this skill via Dark or Holy Hand, but again seems unrelated, I am not even sure if Holy Hand is in this game. I read some people got the skills via Bows (STA), so I guess it's not fixed to STK.
I should try Wands, they're still STK in this game, right ?, though without skills is likely a dead end.