The first thing you have to do is go to the Upper Aetia Region to Colony Omega Camp > upon arrival you will have to use Cammuravi's abilities when he joins your group > go to the laboratory and keep going until you reach a scene.
At the end of the cutscene, you'll see a prompt asking if you want Ethel to go through the aging process. Choosing yes will allow her to return to your party. There is nothing else you need to know about how to revive Ethel Back in Xenoblade Chronicles 3, so we hope we have been as helpful as possible, so that you can get Ethel back on your team quickly.
special edition, characters, collector edition, noah, mio, nia, xenoblade 3, xeno blade 3, sequel, nintendo xenoblade 3