Upon completing a Healing action on another Survivor, they benefit from the following effect until the next time they take damage:

Increases their Action speeds in Healing, Unlocking, Cleansing, and Blessing by 12/14/16 percent.

When performing a rushed action to vault a Window, Pallet, or leave a Locker, you will not leave any Scratch Marks for the next 3 seconds.
Dance With Me has a cool-down of 60/50/40 seconds.

Each time a Survivor other than yourself is killed or sacrificed, Sole Survivor gains 1 Token, up to a maximum of 3 Tokens:

Each Token grants a stack-able radius of 20/22/24 metres within which the Killer is unable to read your Aura, up to a maximum of 60/66/72 metres.
Once you are the last Survivor standing, you benefit from the following effects:

Increases your Repair speed of Generators by +75 percent.
Increases your Opening speed of the Exit Gates and the Hatch by +50 percent.
Increases the odds of becoming the Killers initial Obsession by +100 percent.

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

Unlocks potential in your Aura-reading ability:
While you are hooked:

The Auras of all Survivors are revealed to one another.
Whenever the Killer is within 8/12/16 metres of your Hook, their Aura is revealed to all Survivors.
While any other Survivor is hooked:

The Auras of all other Survivors are revealed to you.
Whenever the Killer is within 8/12/16 metres of the hooked Survivor, their Aura is revealed to you.