According to Shawlong, a Vasto Lorde is determined upon birth as a Hollow or before that. Most of the Espada were Vasto Lorde before becoming an Arrancar. Arrancar is the result of Hollows ...

with Ulquiorra as the Cuatro Espada. Ulquiorra was once a Vasto Lorde-class Hollow, showing distinct moral and power differences from his peers. Ulquiorra's hidden power, Segunda Etapa ...