Leader of the Nereids Kamchatka (カムチャツカ) branch. Rena is capable, elegant, and cunning and makes the decisions, if cold at times. She is cool and calculating and her sharp instincts enable her to know the weaknesses of other people. Rena has no moral qualms about seducing others for manipulation or for a weapon use. She is also frugal with money and deducts pay off salaries for even the slightest error.