Powell is the daughter of Belgian pharmacologist Rudi Pauwels and clinical researcher Carine Claeys, who in 1994 were two of the co-founders of the biotech company Tibotec.
Powell je dcerou belgického farmakologa Rudi Pauwels a vědkyně Carine Claeys, která byla v roce 1994 spoluzakladatelkou biotechnologické společnosti Tibotec.