As Vergil was waiting for his training to start he started to get an awkward feeling, as suddenly a giant bird grabbed him and starting flying away with him. As he saw the rinnegan eyes he started to realize that it has to be a summon from his Senpai. Arriving in the forest, 6 oranged haired men were standing before, all having rinnegan eyes. As suddenly one started talking and and asking Vergil what he knows about the Wind Release.
Ah I see... let's get this started then.
Wind Release or Fuuton is one of the 5 basic elements. Wind Release is mostly used for offense rather than defence. If the nature transformation is done right, wind release get's characteristics of a razor-sharp blade but Wind Release can also sharpen a blade drastically, being able to even dismember enemy shinobis when done right of course.
While Wind Release is strong against Lightning Release but it's weak compared to Fire. Obviously as wind contains massive amounts of Oxygen which sparks fire. In that way it also can be combined with various Fire Releases Jutsus to raise the effectivness.
The known GGK which include the Wind Release are following:
-> Ice Release - It combines Wind with Water, only known user was Haku from the Yuki-Clan from Kirigakure.
-> Storm Release - It combiens Wind with Lightning, known user is Darui from Kumogakure, but it's most likely that this KKG is spread in Kumo.
-> Shakuton - It combines Wind With Fire, the only known user was Pakura from Sunagakure.
and the last one is even more special and an enhancement to KKG as it includes 3 Nature types. A Kekkei Tota, the so called "Dust Release" used by 2 known Shinobi, Ōnoki and Mū, both are/were Shinobis from Iwagakure. It combines Wind, Fire and Earth to form the Kekkei Tota.
I hope I have covered up everything you have asked for Godot-Sensei.
As Vergil finally finished he stands still and waits for an answer from his Sensei.