Natsuki and Natsu Anju

Natsu and Natsuki mother died when Natsu was five and Natsuki was 4, they were found by Mikan and Hotaru and Mikan's grandfather adopted them and they've became best friends. Neither of the siblings new that they had an alice until Mikan disappears and runs after Hotaru and Mikan's Grandfather asks them to follow her. (Hotaru X OC), (Ruka X OC)