Full Name Anna Williams
First Appearance (Alisa's Adventures in Rockoland) Sleepytime Chaos
First Appearance (Barney and the Rocko Squad) Barney's Greatest Hits
Alisa's Adventures in Rockoland Portrayer Tara Platt
Barney and the Rocko Squad Portrayer Tara Platt
"I hope Evil-Man liked his surprise."
— Anna to Ganryu about Evil-Man's Rocket Launcher Cannon.

Anna Williams is the younger sister of Nina Williams and the adult counterpart to Alice Williams. Unlike Tekken: Blood Vengeance, Anna is very nice to her friends, especially Evil-Man, because she built the Rocket Launcher Cannon for him. As of the nineteenth Alisa's Adventures in Rockoland episode, Anna and her older sister now possess a sleeping habit. Like her older sister, Anna is known to be one of Charleston's close friends. Like her sister, Nina, Anna has a childhood counterpart, and she makes various appearances exclusively in Alisa's Adventures in Rockoland.

Anna also appears in Barney and the Rocko Squad, as a part of the Never Land Pirates. She is one of the three Tekken: Blood Vengeance characters to take part in a team from another television show. The other two characters are Ganryu and her older sister, Nina.

Anna is one of the two principals to appear in Alisa's Adventures in Rockoland, as well as Barney and the Rocko Squad, the other principal is Dr. Helper.

Tara Platt is Anna's voice actress during her visits to Rockoland. In Barney and the Rocko Squad, her voice can also be heard through Mrs. Biggle, the mother of Billy and Ruby Biggle.