Nereid

Nereids are capricious and often dangerous aquatic fey that appear as strikingly beautiful women, often seen bathing unclothed in the water. Many sailors have met their doom following a nereid, for though a nereid's beauty is otherworldly, her watery kiss is death. Others seek out nereids, for if one can secure control over the creature's shawl, the cloth can be used to force the nereid's compliance. A nereid forced to obey in this manner immediately attempts to slay her master as soon as she can secure her shawl's safety.

Drowning Kiss — A nereid can flood the lungs of a willing, helpless, or fascinated creature by touching it (traditionally by kissing the creature on the lips). If the target cannot breathe water, it cannot hold its breath and immediately begins to drown. On its turn, the target can attempt a DC 23 Fortitude save to cough up this water; otherwise it falls unconscious at 0 hp. On the next round, the target must save again or drop to –1 hit points and be dying; on the third round it must save again or die. The save DC is Constitution-based.

change shape (medium water elemental, elemental body II)

Unearthly Grace — A nereid adds her Charisma bonus as a deflection bonus to her Armor Class and CMD if she wears no armor.

Ability Focus (beguiling aura), Agile Maneuvers, Defensive Combat Training, Dodge, Mobility, Weapon Finesse

Bluff +20, Escape Artist +24, Knowledge (nature) +17, Perception +21, Perform (sing) +20, Sense Motive +21, Stealth +24, Swim +23