Death:
Death is an Alicorn that wears a black cloak and carries a scythe. His legs and part of his muzzle are skeletal, the rest of his body is normal. His cutie mark is a skull atop a staff with two serpents slithering up it. His coat is black and his mane is white. Occasionally, his eyes glow a dark red when using magic or enraged.
War:
War is an Earth Pony that wears a red cloak and wields a halberd, like the ones that killed him. His coat is crimson and he has a black mane. His cutie mark is a silver gear with two swords crossed in front of it. He body is also covered with scars and wounds from various battles he has fought, including a missing eye..
Famine:
Famine is a Pegasus that wears a pale yellow cloak and uses a dagger. Her coat is a faded yellow and her mane is a dull green. Her cutie mark is a rib cage with a loaf of bread inside it. Her body shows signs of starvation, and she is extremely skinny. Many of her bones can be seen through her skin.
Pestilence:
Pestilence is a Unicorn that wears a dark green cloak and uses a syringe. His coat is a pale green and he has a slightly darker shade of green mane. His cutie mark is a red biohazard symbol behind a syringe with a black drop of liquid falling from it. His body is a patchwork of various diseases. His mane, coat, and tail have patches of hair missing. Where flesh is exposed, raw, irritated looking skin can be seen. Tumors are also evident in some places of his body.