https://jezebel.com/cosby-protestor-who-used-to-appear-on-the-cosby-show-1825109804

Nicolle Rochelle, who appeared on several Cosby Show episodes under the name Nicole Leach, had the names of Cosby's accusers and "Women's Lives Matter" (https://www.nbcnews.com/video/naked-protester-jumps-in-front-of-bill-cosby-as-he-walks-into-court-1206258243561) painted on her chest when she confronted Cosby before his court appearance this morning. She was arrested and charged with disorderly conduct.

Topless woman arrested at Bill Cosby trial says she recurred on The Cosby Show at age 12, but that wasn't why she was protesting (https://etcanada.com/news/316666/topless-woman-arrested-after-charging-at-bill-cosby-ahead-of-sexual-assault-retrial/)
Nicolle Rochelle says she would've protested Cosby regardless of whether she had worked previously worked with him.

I looked at Nicole Leach's IMDB, she actually played two different characters. She appeared in a season 6 and a season 7 episode as one of Rudy's friends, Davina. She also appeared in two season 8 episodes as Danielle, another one of Rudy's friends. In real life, Nicolle is a month younger than Keisha Knight Pulliam, both ladies are my age.