A five-member (initially six-member) group of utaites, ASMR streamers, and game commentators under STPR Inc. Aside from their online activities, Knight A has also done one-man lives and has released merchandise to commemorate all their lives.
Mahito and Soma graduated in 2024 and 2025 respectively. Knight A went on with three members until May 17th, 2025, when they rebranded as Knight X - with the addition of Takeyaki Shou.
