Mermaids are humanoid monsters possessing long fish-like lower bodies, but despite their physiology they are capable of walking on land using their fin tails. Generally friendly with humans, they live around Port Natalia and the Sabasa Castle, also setting up pubs in the two locations. Due to their aquatic traits, they are natural swimmers and can accelerate very fast in the water.
In addition to their powerful swimming, Mermaids can manipulate water magic. The songs they sing are also powerful enough to put men into a trance. Furthermore, a mermaid's blood possesses regenerative properties, healing those who consume it.