Dionni is 16 and is Dinah Jane's sister from Fifth Harmony. Dionni has a twin sister Dina, they both also sing and are one of the best girl's dance group. Since the twins and Dinah don't see each other so much because they are always away, one day Dinah and the the twins see each other and Dinah brings along the four girls with her to meet them. When Ally meets Dionni she starts to feel some type of way. They eventually become best friends which only brought them even closer.