Uh, no it is not silly. All the main characters were based on plays/characters by Shakespeare. The writer outright said it in an interview. The writer pays homage to Shakespeare in the whole bloody anime.
Yoshino is based on Romeo (Romeo and Juliet) and Horatio (Hamlet)
Hakaze is based on Prospero (Tempest)
Mahiro is based on Prince Hamlet and Laertes (Hamlet)
Aika is based on Sycorax (Tempest) and Ophelia (Hamlet)