Here is the full list of all 34 Ashen achievements.
Complete Flokir's journey.
Reunite the Listener and Human hearts.
Wear the Umbral Veil.
Wear each relic once.
Leap into the dark portal.
Unlock all townsfolk outfits.
Defeat the Shadow of the Ashen.
Complete Jokell's journey.
Untangle Sissna's weave at the Palace of Lathyrus.
Complete Vorsa's journey.
Complete Eila's journey.
Acquire all lanterns.
Construct all houses in Vagrant's Rest.
Meet Kol the wildman.
Hunt a roamar.
Unlock all crafting specialities.
Travel the shadow pathways.
Defeat Touma and Souma.
Defeat the Listener Matriarch.
Take a ride in Eila's barrel.
Free the Diasora pup.
Discover the secret of Contemplation.
Defeat the brute near Vagrant's Rest.
Hunt a squork.
Hunt the corb near Vagrant's Rest.
Defeat the Elder Dark Ukkoto.
Hunt a Deer.
Claim Vagrant's Rest.
Hunt a rafet.
Defeat the Elder Dark Sissna.
Defeat Sissna in the Children of Sissna mode.
Defeat the Elder Dark Riak.
Defeat Riak in the Children of Sissna mode.
Acquire all Kol's armors.