ZUN, also known as Jun'ya Ōta, is a Japanese video game developer, music composer, and the sole member of the doujin circle Team Shanghai Alice. He is best known for creating the Touhou Project series, a series of bullet hell shooter games. "Night of Knights" is not directly associated with ZUN but is a popular Touhou Project music arrangement.
"Night of Knights" is a well-known fan-made arrangement of the theme "Night of Nights," which originally appeared in the Touhou Project game "Sakuya Izayoi's Theme - Lunar Clock ~ Luna Dial" from the game "Touhou Koumakyou ~ the Embodiment of Scarlet Devil." The arrangement was created by BeatMARIO, and it gained popularity on the internet due to its fast-paced and energetic style.
ZUN is primarily recognized for his contributions to the Touhou Project, where he handles various aspects of game development, including programming, graphics, and music composition. While "Night of Knights" isn't an original ZUN composition, it showcases the influence and creative community that has emerged around the Touhou Project.