Fair warning: The encoding is terrible and the dude takes his time explaining the character mechanics in Japanese. Don't expect too many sick combos.
Lady looks like a heck of a keepaway character. She has Dual Pistols, a Shotgun and the Kalina Ann. She can do cross-map High Times and Helm Splitters using her grappling hook.
Her meter mechanic looks to be a 3-stock charge that differs from gun to gun. The Shotgun acts like Dante's charge shot only longer, Pistols launch enemies and the KA gets a big-ass super rocket. It looks like you can't move while charging the super rocket.
She has Gunstinger. It appears to automatically chain into a rocket backdash too, reinforcing the keepaway strategy. Not sure if this is Shotgun only.
KA gets a ZoE2-style multi-lock where you sweep lock-on cursors across a bunch of enemies and unleash tons of missiles. Hysteric is back from DMC3 too.
KA has a big 360 spin slash for crowd control.
Air Hike? Rocket Jumps!
KA has some kind of huge screen-clearing explosive attack. Doesn't look like it costs anything, and the DT meter isn't always full so I don't think they're using a super costume.
Trish's bit is set in that dark-ish room where you fight Dante for the second time as Nero, which fucks with the encoding big time. What I've managed to spot so far:
Sparda looks like it uses at least part of the DMC1 moveset- the cross slash combo is in there
She has a lightning version of Rolling Blaze from DMC1
The scythe Round Trip is back, now with enormous range
Round Trip variants- She uses it to boomerang around a bunch of enemies and blast them toward her from mid-range
Her moveset changes to Ifrit-like melee during Round Trip- Looks like her fists fire huge lightning projectiles when fully charged
A variant on Beowulf's Volcano that AoE launches enemies when charged
Ifrit's punt launcher
High kick string combos
SPINNING BIRD KICK?! (Into AoE launcher)
Lightning variants of Lunar Phase and Starfall
Twin Pistols. Probably Luce & Ombra
All of Pandora's non-Gunslinger tech. This didn't require a weapon switch, so it probably takes the place of a charge shot.
Aerial versions of Pandora's ground moves from the base game (!!!)