Notes:

Pros and Cons of drinking the Blood Water.

Pros:

Gain the power of telepathy.

Are able to resurrect from death indefinitely.

View the world and all your undead friends through rose-tinted goggles.

Maintain most of your memories and personality after zombification.

Cons:

Become a slave to a monstrous insect demon and are forced to construct a nest to allow it to return to the mortal realm.

Eventually devolve into a feral bug-man when the insect demon compels you to OD on blood water.

Will always resurrect, no matter if you are in a good position to do so or not. (e.g: Buried alive, trapped in a furnace, stuck at the bottom of a lake.)

Under constant threat of being Ara Ara'd by degenerates once the mutations kick in.

As a side note, the more I think about it, the more I come to realise that Bloodborne and Forbidden Siren have a lot in common, thematically speaking.