Known as "Lady Fina" to the other DearS. Her official position is that of the "Watcher", and she seems to be the leader of the DearS colony; even Rubi bows to her. She does not awaken until volume 5 of the manga, and seems to support Takeya taking Ren in as his slave. In fact, she immediately orders Rubi to stop trying to recapture Ren.
Fina seems to be the oldest of the DearS seen so far, and knows almost everything there is to know about the DearS and their "society". Fina can be quite flaky. She also seems to be narcoleptic, seeming to always doze off at the most inopportune times. Eventually, she decides to stay behind on Earth to watch over the DearS that remain on the planet.