This was an idea I had for what if one of the survivors turned into a killer. Since Jake has an affiliation with crows, I had this idea. Enjoy.

The Raven / The Nevermore (Jake Park)
Appearance: A plague doctor's mask hides his face. The ends of the masks have been melted into flesh, making the mask unremoveable. He is covered in a cloak made out of feathers. Beneath the cloak is his signature green jacket, torn up and ruined. Holes in the jacket show decaying skin and multiple slashes on his chest. His left arm is horribly transformed into a crow's claw, which he uses to strike at his prey.

Ability
Soar
Every 120 seconds, The Raven can grow a pair of wings and soar into the air above the map, followed closely by a large amount of crows. He will then be ably to freely fly around for the next twenty seconds. Survivors are notified of when The Raven flies up by the sound of a monstrous shriek, followed by the sound of multiple cawing crows. Any survivor The Raven spots when flying are marked, having their aura shown for the next 5 seconds. The Raven then must make a choice: Cancel his flying to fall from the sky onto the ground, stunning him momentarily to potentially chase someone he marked or wait for the twenty seconds to be up and let him slowly glide down onto the ground.

Ability 2 (This ability is always in effect. It's not really an ability anyways just a trait of him.)
Crows will not fly away from you.

Mori Animation
The Raven grows a pair of wings, and lifts up the survivor from the ground with them. He then stabs the survivor with his clawed hand, and slices them open. Letting out an ear piercing shriek in the survivors face as their intestines slip out of their wound. After he stops shrieking, he drops the survivors and steps back.

Perks

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Your link to the avians make it easier to find prey. When someone escapes from you in a chase, There is a 10% / 20% / 30% chance that a few crows will fly above them for the next 2 / 3 / 4 seconds. You will get a notification of the survivors location after the crows fly away if you are within a 36 / 32 / 26 meter range of the survivor. This effect can only happen every 90 / 80 / 70 seconds.
"Go forth, My creatures of darkness. Find my prey and show thee to me."

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Your link to the avians make it easier to track them. Crow's auras are revealed to you in an 32 / 64 / unlimited meter range. Disturbed crow's auras will update 15 / 10 / 5 seconds after they have been disturbed.

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Your link to the avians make it easier to distract your prey. When a crow is disturbed, There is a 15% / 20% / 25% chance that the aforementioned crow will attack the survivor. The attack will leave the survivor in an injured state. The attacked survivor's aura is revealed to you for 1 / 2 / 3 seconds. A cooldown of 80 / 75 / 70 seconds must be done before this effect can happen again.