How to forge bonds with Poseidon, Demeter and etc?

[Bopple]

The last heart is locked for them. What to do?

[C4RNIVOR3]

Poseidon requires catching a few fish. Demeter I have not checked yet as she only just opened up for 1.0. It varies for each character but much of the time what you have to do will relate in some way to that character (Poseidon with fish, Dionysus with gifting nectar/ambrosia, and so on)

[Gregor]

Often you need to have heard specific dialouges ones you've had those the last hearts will unlock, that's for example the case with Hermes.(There might be more conditions hidden I've just done without knowing that those where conditions to reach that point.)

I've ones read that Artemis needs to tell you about a specific person all the avaliable lines and then you'll unlock the possibility to deepen the relationship through gifts.

You can recognice if you'r still getting a "new" dialougue compared with a to me seemingly random set of dialouges by the sound and the light the thing you interact with are doing.

Some characters need you to have taken specific interactions before you'r able to progress in the relationship, ones you've done that the possibility to deepen the relationship through gifts is given.

[C4RNIVOR3]

^ The Artemis one makes sense, because a big part of her characterization is that she's reclusive, and she notes to Zagreus that he seems to be the only one that listens to her. So unlocking her heart involves precisely that: listening to her about something that's important to her.

Again, many of them involve something related to them in some way.

[Bopple]

Hmm.. Do I need to unlock every fish in the game to forge bond with Poseidon?

[Gregor]

Originally posted by Bopple:

Hmm.. Do I need to unlock every fish in the game to forge bond with Poseidon?

No

[Carras]

Did anyone forge bond with Demeter? I cannot find what is needed for her ;(

[Giraffeguin]

I have read Demeter requires you to have done the epilogue and then chatting with her (I still haven't unlocked hers after a couple of post-epilogue runs but I am still getting some new dialog, so probably a few more chats will do the trick)

Note: I mean the Epilogue, not the Credits. If you have the achievement "One for the Ages" then you can pursue Demeter's locked heart.

[mata_destroyer]

How to forge bond with Hermes?

[Darth Bokeh]

Hermes - max his keepsake and speak to him while wearing it.