Vaughn, who is based in Tucson, booked plane tickets, made hotel reservations and, most importantly, began crafting her costume. CCosplay She planned to go as different versions of the alien Pearl from the animated series “Steven Universe,” one of her favorite shows. Wanda Maximoff Costume But as concerns over the coronavirus pandemic grew and other conventions canceled, it became clear to Vaughn that her hopes of attending SDCC would be dashed.