Princess Aiko, the only child of Emperor Naruhito and Empress Masako, turned 18 on Sunday, enjoying her last year in high school as she prepares to move on for further studies at university starting next spring.The cello-loving princess, currently a third-year student at Gakushuin Girls' Senior High School in Tokyo, vigorously carried out school assignments and studied for exams -- sometimes getting advice from the imperial couple, according to the Imperial Household Agency.The princess rejoiced in her class victory at an athletics meet in September, while spectators were excited when she p…READ FULL ARTICLE