Mushiki Kuga

Relatives: Ruri Fuyajou (Younger Sister), Ai Fuyajou (Mother)

Mushiki Kuga is the main protagonist of King's Proposal. He is an ordinary high schooler who has inherited the body and identity of Saika Kuozaki and is assuming them to remain in order at Void Garden, he is also the older brother of Ruri Fuyajou. Due to an incident involving him and Saika, Mushiki's consciousness now resides in Saika's body, thus sharing her appearances.

Mushiki has the personality of a typical teenager: getting flustered by unknown situations and girls, and becoming serious whenever needed to. He is also extremely soft-spoken and speaks in a very polite way of speaking. He notably has a strong admiration of Saika Kuozaki, describing himself to fall in love with her at first sight and described her in a flamboyant and excited manner whenever she is mentioned, much to Kuroe Karasuma's apparent disgust. While at first Mushiki can be seen as quite simple-minded he actually not as dumb. Before they parted ways because of currently unknown circumstances it is stated that Mushiki is a good older brother for his younger sister Ruri that was proved by her having a very fond memory of him.

Assuming Saika's body, Mushiki is forced to also adapt to her further identity, including her personality.