Janina Zione Gavankar (born November 29, 1980) is an American actress and musician. Gavankar is trained as a pianist, vocalist, and orchestral percussionist. She majored in Theatre Performance at the University of Illinois at Chicago. Gavankar's roles include a police officer on The Gates; Ms. Dewey, the personification of a Microsoft branded search engine who commented on the user's searches; Shiva, the namesake of the sought-after trophy on The League; shapeshifter Luna Garza on HBO's True Blood; McKenna Hall on The CW's Arrow; and Meredith Bose on NBC's The Mysteries of Laura. She also played Diana Thomas on Fox's supernatural drama Sleepy Hollow. Description above from the Wikipedia article Janina Gavankar, licensed under CC-BY-SA, full list of contributors on Wikipedia.