Is there any chance that the heart is that of the empress? I mean there are some instances of dialogue that alludes to the heart belonging to someone familiar e.g the my heart is at peace and the portion where the heart says that both you and it have been here before in the tower. Si? No? Mebe?

I have had that question as well, also don't forget to use it on the people you meet, is has interesting insights.

Either way, the heart is the coolest thing ever to me.

I do personally believe it is the empresses heart, though not confirmed, it makes sense with the dialogue

All the dialouge on the palace level pretty much points to it being Empress' heart.

Yup. Hmm... I wonder if we will ever find confirmation

I feel the same way, but mostly because they sound the same. It's kind of romantic, in a psychotic sort of way.