Another of Siania's classmates, he plays the viola, though he used to play the violin. He has an extreme fondness for cute things, leading him to take a liking to Siania. Natsuki is a gentle, quiet young man who is a bit of an air-headed romantic. He is a musical genius, particularly when it comes to singing and performing with stringed instruments. He absolutely loves cute things, which to him generally means anything smaller than he is, and he will hug anything that catches his interest.