- Serafins are a closed species with open traits (meaning they have no rarities or set traits, but cannot be created freely and require an MYO and staff approval to be official.)
- They are aquatic and flying creatures that love to live in dark and warm places, such as hydrothermal vents. They are agile and quick fliers and swimmers, but aren't nearly as good runners. Their smelling capacities are also lacking.
- They can fly with the fins attached to their arms, and they can extend them as needed, somewhat like a flying squirrel.
- They can go a long time without eating during times of famine as they store energy in a capsule on their tail.
- The capsules in their bodies are made of glass, which is regenerated through their blood.
- Serafins are highly variable in size as they adapt to the environment they live in, so their height varies from 35 centimeters to 3 meters.
- They are extremely intelligent.