Mamoru

    Or Mamo-chan, as ChibiUsa would call him ... however. in the future, she refers to him as "daddy", of course! From the moment Tuxedo Kamen held the tiny stranger in his arms in present Tokyo, he knew there was something about her that seemed strangely familiar.
    Mamoru and ChibiUsa are very close. The pink one took an instant liking to him, even as she fell on his head. Mamoro is always there to protect (and spoil) ChibiUsa, and makes up for Endymion 1,000 years away.
    People like to think that ChibiUsa has a crush on Mamoru (:->). In fact, she even claims that he's her senpai (boyfriend) in SailorMoon R! But the truth is that she steals Mamo-chan's attention to make Usagi jealous. (She finally quits after meeting Helios, but that's another story ....)
    ChibiUsa and Mamoru share a deep concern for each other's welfare that makes their a realtionship a binding one, but Mamoro also makes a good cover-up daddy for Endymion while ChibiUsa is not at home in the future.