Here is the full list of all 12 Wind Child achievements.
Befriend the captain.
Befriend the free spirit.
Save the Alvwa Queen.
Receive the gift of magic
Witness the fate of Fort Abigail.
Befriend the cadet.
Begin the Journey.
Infiltrate the Imperium Research Facility and survive the Security Droid.
Find the lost armaments and learn about the Kaze hero.
Defeat the Grey Knight.
Unlock the mausoleum.
Befriend the immortal.