Pyre

Hedwyn individually needs to deliver 200 Pyre Damage cumulatively (basically, points stack up) in multiple Rites before this pops up. If you reach a Liberation Rite and are planning to free him but this trophy hasn’t popped up, head over to Practise Rite mode (accessed through the Beyonder Crystal in the wagon) and keep playing Rites (with Hedwyn selected in your triumvirate) until this pops up.