Unlocks potential in your Aura-reading ability.
Once all Generators are completed, Wake Up! activates:

The Auras of the Exit Gate Switches are revealed to you within 128 metres.
When opening an Exit Gate, your Aura is revealed to all other Survivors within 128 metres.
You open Exit Gates 15/20/25 percent faster.

Unlocks potential in your Aura-reading ability:
Paranoia paired with your horror of failure helps prepare you from repeating the same mistakes.

The Auras of the 3 Generators in closest proximity to one another are revealed to you for 30/45/60 seconds at the start of the Trial, and each time a Generator is completed.
Increases your Repair speed on those Generators by +5 percent while active.
If you are holding a Map, all Generators revealed by Déjà Vu are automatically added to it.

When you or the Obsession are injured, you both see each other's Auras.

After healing the Obsession or being healed by the Obsession, you both gain the Haste Status Effect, moving at an increased speed of 5/6/7 percent until you are no longer within 16 metres of each other.
If you are the Obsession, Blood Pact deactivates.
Lowers the odds of becoming the Killer's initial Obsession by -100 percent.

The Killer can only be obsessed with Survivor at a time.

After repairing Generators for a total of 33 percent, Wiretap activates:

After repairing a Generator for 3 seconds, press the Active Ability button to install a Wiretap, which stays active for 60/70/80 seconds.
The Auras of trapped Generators are revealed to all Survivors in yellow.
When the Killer comes within 14 metres of a trapped Generator, their Aura is revealed to all Survivors.
Damaging the Generator destroys the Wiretap.