Depende
Eles podem ver fantasmas sem problemas (Geist: The Sin Eaters p. 174):
Sin-Eaters see ghosts as readily as they see the living, and can easily discern between the two.
Para ver no Crepúsculo, eles precisam inverter a posse de seu geist (Geist: The Sin Eaters p. 175):
A Sin-Eater can transfer his consciousness into his geist [...] This allows the Sin-Eater to see not just ghosts, but anything in a state of Twilight, as well as physically interact with its denizens and any Twilight objects.
Isso levaria a uma situação em que o Sin-Eater vê & interage com todas as entidades de Crepúsculo, mas os diferentes tipos de seres efêmeros não afetam um ao outro. Como encontrado no God-Machine Chronicle p. 215:
Instead of bodies formed of flesh and bone, ephemeral beings are made up of spiritual matter called ephemera, which comes in several varieties. These substances are both invisible and intangible to anything not comprised of the same sort of ephemera[...]
Ou:
- Fantasmas veem outros fantasmas & nada mais
- Espíritos vêem outros espíritos & nada mais
- Anjos veem outros anjos & nada mais
- Sin-Eaters ver & interaja com tudo