Setsuna raises his sword and makes a forward strike down.
Setsuna reaches for airborne opponent. Will slam opponent into ground if it connects. Setsuna's opponent must be airborne to perform.
Setsuna charges himself with electricity, giving him a temporary armor.
Setsuna performs an Anonymity - One that deals more damage and has more range.
Super Desperation Moves
Setsuna calls down lighting to empower him with an Anonymity - Five that lasts 10 seconds.
He's best in Power, but he's also surprisingly good in EX.
First off, never ever use his on a downed opponent no matter how far away you are. It gives your opponent frame advantage. Hell, the recovery on it is so bad that they can actually you when they get up.
Because he's pretty basic combo-wise on power (most of the corner stuff is just for show), you're basically relying on damage. His is very very quick and long range however, so it's great for throw mix-ups. Keep in mind that his jump can be red parried on the second hit, but it's hard, so unless you're being exceedingly predictable with it, you should be ok, and repeated low jump 's mixed with 's and throws can be great for pressuring an opponent.
Use short dash > and > > to punish ground recoveries after combos or overhead launches. or to punish air recoveries. Also, after any successful super hit, activate your armor/super armor (this is the only time it's safe to do this), or if they're almost dead, dash in and . The armor's good for one hit, and can be good for getting a throw or something in.
Setsuna's main problem on speed is that he has the worst goddamn overhead in the game next to Mukuro and Amano. It has a ton of range, but it's so goddamn slow and it has terrible recovery. You can't even get a reset off it to start his speed combo special in the corner.
However, because he gets to combo from / in speed, and because it's got such great range, he's much more versatile in that mode, if a lot more strapped for damage. This means that Setsuna is one of the few characters who actually benefits from using EX mode, since he can combo into his DM that way.
The advantage with EX is that you'll have his super armor, plus his long range / combos and throw mix-ups which puts the opponent in a nasty spot once your health gets low. Remember you take more damage in EX though, so use the armor to avoid resets rather than big damage. Plus, comes out quick, and if someone sees it, their first instinct is to block low. If you cancel into (which is an overhead), you can catch people offguard quite often.
The downside is that you don't gain meter half as fast, so your damage potential still drops by quite a bit.