Luma
Servant of the Avatar of Light
Luma is an elemental and servant of Celeritas who helps Lynaria attempt to purify Sepulchure despite his discomfort with the darkness of the fortress. He warns that some beings of Light oppose her efforts and cannot promise that purification will restore an undead person to life.
Energy released by Sepulchure corrupts Luma, forcing Lynaria to defeat her ally. Astero later calls Luma its predecessor, while Fort Luma holds a memorial to him.
Sources
Luma's dialogue · Sepulchure's story · Astero's dialogue · Fort Luma