Siren

Strategies
The Siren is a very pure species themselves but still very good at seducing others and dropping their resistance.

Combat
The Siren can be used to spread water tiles onto the board.

Since the Siren is effectively always standing in water, consider using one with "Burning", which increments the attack and burn status by one each turn. The Siren won't take damage, but will gain the attack buff.

Trivia
Their body glows brightly from the inside, making it possible to see outlines of whatever is penetrating their pussies.