Leader of the Nereids Kamchatka branch. Rena is capable, elegant, and cunning, although she can be cold at times. Although not the branch manager in title, she is the de facto leader and makes the decisions. 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 from salaries under even the slightest pretext.