The character is based on Ognjen, the name is a play on the words Box & Head (a physical rectangle for the shape of the head as well as the act of boxing/fighting). The hair is based on his hairstyle.

The left eye was designed as a swirl eluding to his disability to clearly see from the left eye due astigmatism. The stitches evoke the numerous cuts sustained throughout Ognjen's fight career.