It is said in the trivias that Yoshino represents Horatio, Mahiro represents Hamlet and Aika represents Sycorax. However, in my opinion, I think that it is more likely that Yoshino represents Hamlet, Aika represents Ophelia, who Hamlet loves (and died), and Mahiro represents Laetus, who is Ophelia's brother (and later kills Hamlet, blaming the prince to be the cause of Ophelia's death). I am quite confused, so I hope someone can explain it for me.