I'm going to play a raptorkin skinwalker on my next campaign with the adaptive shifter class.
I saw that the sky hunter form gives a fly speed equals to her base speed, but it is not precised how this manifest on the character.
Can i suppose that it makes the character grow wings ?
It is not specifically called out how that looks since thats up to your imagination. It is just flyspeed and average maneuverability ruleswise, so basically any wings you want.
Remember to make it a lasting adaption you need 3 levels above the requirement. -> level 9 to make it permanent.