Any god or goddess will do but please don’t jump to Hades, which is fine if think of a reason why it would fit just not because she works in a morgue or Apollo because she’s a doctor.
Like Nemesis *“…True success requires sacrifice.” Helping Sherlock fake his death
Dionysus, maybe it wasn’t a miscalculation on her part with John’s stag night.

*Quote form Camp Half Blood Wiki website which originally got it from: The Mark of Athena,
Nemesis to Leo and Hazel