Maliwal, an RTI activist, succeeds Barkha Singh.
After assuming charge, Maliwal said safety of women would be her top priority. [Kejriwal appoints AAP leader's wife as next DCW chief]
"Safety of women in the national capital would be my top priority as crimes against them are increasing in the city," said Maliwal, who was a member of the India Against Corruption anti-graft movement.
The Congress and the Bharatiya Janata Party criticised Delhi Chief Minister Arvind Kejriwal for appointing Maliwal as DCW chief.