Thomas Cavendish, a Mermaid.
Mermaids (人魚, Ningyo) are a race of fish humanoids that lives under the water. Like the legendary creature of the same name, their upper body is that of a human and the tail of a fish. As seen with Thomas Cavendish, mermaids need to be undersea to survive, so she can only attend to TRUMPS meetings by Divine Correspondence or holographic display.