- This song appears in Cytus Selection Package.
- The two girls in the cover are Iris (blue hair) and Rosabel (red hair).
- The note lines are mainly colored blue (indicating Iris), red (indicating Rosabel) or purple.
- Hold notes and slide notes form the letter K, referring to the title of the song, Holy Knight.
- There is a triple set of notes that must be hit at the same time at the end of the song, like in the Cytus and Deemo versions of Holy Knight.
- However, they can all be hit with two fingers by tapping the spaces where the note lines overlap.