Also I would like to add that I don't know how to get the fourth heart with Jessica, It keeps saying look into the organisation as the hint aswell.
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You need to progress main story (ORG lead) to progress with Jessica’s last heart.
Also Jessica is a requirement to progress that bit of the main story.
If you don’t have the leads, you missed a step on the start sequence of act 2.
- Go to Manor’s garden
- Visit Gramps and talk to him
- Train Martial (all 4) then talk again
- Fetch pigeon in lake (check 3 times)
- Talk some more.