I got a ref of the greater angel of death, they of cruelty themselves, Ayanami!
The angels of death were born when the red crown was made. Their duty was to guide souls to their afterlives, they either lived an eternal paradise or an eternal hell.
The greater angel served as the leader, having great power, however, this came with the cost of a limited lifespan, so they appointed a successor that will carry their ways when they die. So the cycle would repeat forever.
Ayanami is the current greater angel, being around halfway through their lifespan.
They’re passionate about their work to a fault, being downright cruel to souls that would be granted hell, turning the worst of the worst into monstrous beasts locked into eternal suffering. They, along with all angels, are also gifted in singing, often singing about their work with their beautiful voices.
Lamb supplanting Narinder inadvertently caused the afterlife to be destabilized, enraging Ayanami greatly, with the angel devising a plan to take down the current crown bearer and those who imprisoned Narinder all those years ago.
Ayanami had a valid concern over the crown being in the hands of someone merciful, but they twisted the realms of life and death just to get what they wanted. The Fates are thankful that their supposed king would later thwart their plans and free the five confined revenants…
(Additional note: Ayanami is gender-fluid and can be referred to by any pronouns, same goes for Strelitzia and the other angels)