In the name of my kin Trophy in Resonance: A Plague Tale Legacy

Theseus is the ancient hero whose story the game tells in flashbacks. His five Echoes are axe altars: interacting with one plays a short memory and gives a Pierced Coin, which also counts for Superstitious. There is one each in Chapters V, VI, VII, IX and X. None is missable, and Chapter Select takes you back for one you missed. The checklist has each one's place, and PowerPyx's Echo guide has a screenshot of each.