Task Finder
...
The Perfumer Tricia Ashes are one of the many Spirit Ashes and Tools found throughout Elden Ring.
You can find the Perfumer Tricia Ashes in the Unsightly Catacombs in Altus Plateau. This is found under the Perfumer's Ruins and requires 2 Stonesword Keys to enter. The ashes can be obtained from defeating the Misbegotten Warrior and Perfumer Tricia bosses.
You can also pick up the Winged Misbegotten Ashes from these catacombs. You'll find these in a pit of Misbegotten, from a corpse sitting against the wall.