Death Mark:
A mark given to someone when they've had a near death expirience. This means the soul is more aware, causing your powers to flourish. A death mark takes form of an animal, sometimes angelistic beings (Such as Angels, Demons), and fantasy characters (Such as Dragons or Mermaids).

Seekers:
These are the people who use their Death Mark, wether it's for good or evil. When using their powers, their eyes glow the color of their soul along with take traits of certain animals that their soul represents.
Ex: If you're soul was to be a cat and the color was pink, when you'd go to use your power, your eyes would glow pink, you'd have a pink tail, ears and claws. Simple.

Humans:
Everyone starts out as humans. They are oblivious to who the Seekers are unless told and they tend to ask too many questions.