Sailor Cosmos

[Sir_David_of_Fairborn]

Who exactly is she? I heard she is the grown up Chibi Chibi, and I also heard that she is the ultimate form of Sailor Moon. Which is she?  

[Avane Anime]

the quick answer is she is both another form of chibi chibi and a future form of sailor moon. It's really confusing if you haven't read the manga, but wikimoon does a decent enough job of explaining it.

http://www.wikimoon.org/index.php?title=Sailor_Cosmos  

[mistress_hydro]

she looks pretty.  

[NichiTsukinoko]

She is a future form of Sailor Moon and the Grown up form of Chibi Chibi but she herself says she is not the ultimate form of Sailor Moon since she herself could not compete with the act of courage and sacrifice performed by Eternal Sailor Moon during the final battle in the last Volume of Sailor Moon Stars.  

[Miss Lillian Van Dort]

I never read the Sailor Moon Stars manga but I also heard she was a senshi who disguised as little ChibiChibi. Sailor Cosmos is very pretty an I adopted a pixel doll of her ^_^