Princess Kakyuu first appeared in Episode 192 in the very end.
A part of the episode:
As Nyanko was going to take the star seed, Chibi Chibi came in between her and Usagi. But the black hole swallowed both Usagi and Chibi Chibi, along with the star seed. Nyanko gave up and was about to leave, but an explosion came out from the black hole.. destroying the black hole. Chibi Chibi was holding the censer, and there was a powerful light shooting out from it. Usagi was floating in the air. Then the princess appeared (floating in the air), and was holding Usagi in her arms.
and so...now she exists and will make an impact on the Sailor Stars Series.
0_o
