Ninja effortpost.
Ninjas, first off, equip a two handed ranged/melee combo weapon, a giant shuriken in one hand and a kunai in another. The current shadowy talents event is having you build one of those, for the record. It's compatible with smash/whirlwind/etc. They use str/will also, as we already know.
Skills!
Shuriken Mastery. does what it says on the tin.
Rasenzan - Basically, shuriken smash. Presumably. No idea if it breaks defense or what.
Kage Shibari (Shadow Bind) - Immobilizes an enemy. Maybe multiple, almost certainly at a range.
daichi Jin (Ground trap) - Reduces enemy movement speed, proably via a trap on the ground. Go fig.
Yamiuchi Sen (Spinning Sneak attack) - Can be used while hidden, no idea what that means, maybe play dead/hide, and can act as a counter, presumably in a way similar to how windmill acts as a counter.
Oboro Enmaku (Smokescreen) - Lowers enemy defense. No idea how many targets or what.
Midari Kunai (Chaotic Kunai Throw) - Area of effect attack, presumably not unlike windmill.
Ougi Sakura Shigure (Arcane art Sakura rain) - Strong area of effect attack, with a huge cast time. Presumably something similar to int magic.
Annnd reforges.
Shuriken Mastery: Min, Max Increase
Rasenzan: Distance Increase
Midari Kunai: Dmg% Increase, Distance Increase
Kageshibari: Bind Duration Increase
Yamiuchi Sen: Skill Duration Increase, Dmg% Increase
Daiji Gen: Dmg% Increase, Trap Number Increase, Cooldown Decrease
Oboro Enmaku: Dmg% Increase, Distnace Increase
Ougi-Sakura Shigure: Range Increase
That's unfortunately about all I've got, because mabinogi wiki has decided to not post any in depth info about skills that aren't in english mabi for some reason. So it's kinda hard to say exactly what it can do.
Info obtained from
here if you want to poke around. Also features an admin doing their job and moving a big stupid argument to another topic, wowee.