The Starlights have just left and Usagi is asking Mamoru about his feelings for her.  This is right before the end when they kiss and Usagi ends the series by saying, "I'm Tsukino Usagi, 16 years old, in first year of high school. I'm a little clumsy, and a little bit of a cry baby. But actually, I'm the fighter for love and justice, Sailor Moon." 

From Sailor Moon Stars Episode 200 - "Usagi's Love! The Moonlight Lights Up the Galaxy"