Meet Taikirha Miller. She is a model, an actress, a voice-over artist and a rising junior at Kensington’s Albert Einstein High School. The 16-year-old was recently selected by Serena Williams to be the voice of her daughter Olympia’s doll, Qai Qai, in a new YouTube series. Qai Qai, pronounced quay-quay, is the favorite doll of...