It seems that this skill doesn't give flight. Can anyone confirm this?
the stickies only tells that Ethereal give all movement type so anti-air, dive charge, etc will activated.

think it only give dive firewalk grounded and mole

I think it was listed in the "Bugs and other unusual behavior" thread.

Ethereal was originally "Four-element defense" or something, meaning it only applies to Dive, Burrow, Firewalk, Grounded.

As such, I'm also fairly certain it does not trigger Anti-Air.

it appears the skill only grants ground based movement.

Burrow, Dive, Firewalk and Grounded. for flight you still need bracelet or special armor

ok, thanks
wing bracelet should do the trick

I'd think having wing bracelet negates the dive part?...

Also if I remember correctly, it was noted elsewhere that some events/bonuses are triggerable only by ground movement.

Wing bracelet doesn't negate dive (or any other effect, for that matter)
You can have a character with flight and dive (and grounded, and burrow, and firewalk) without and drawbacks. All it does is allows your character to go everywhere.