The fifth and last sailor to appear in the first series was Sailor Sam. However, she was actually the first chronologically to transform, as she had been approached by the guardian owl Jason Jonesemis before Stephen Junior got to Jon, and for a short time fought crime in Canada as Sailor B.
By the second series, it was pretty clear that Jason had something of a crush on Sam, and there were Jasam shippers ("the other J/S") from the beginning. When a little owl from the future showed up and addressed Jason as "Daddy!", Sam had a hard time hiding her jealousy.
Fortunately for everyone's sanity, it was revealed earlier in Sailor Jon than Sailor Moon that Jason and Junior could take human forms. So when little Piper addressed Sam as "Mommy!", it wasn't as disturbing as it could have been.
The family, all in human form. (Piper, for reasons unexplained, retains her wings in this form, just as Diana retains her tail
as seen in this picture.)
Sam is pictured in her official princess dress, which like all the others has the same color themes as her sailorfuku.