There were people who were saying Terashi was Agito’s clone, hah! And it turns out Lu Tian is his actual mirror match. Even has his own psycho face for when he goes into “formless”. I’m guessing the survivors of the Gu Ritual were meant to learn the Formless Stance somehow through the process? Assuming it wasn’t taught to them directly, though the nature of the Formless Stance makes it more like something derived from instincts and a sense for combat.
Also, Fei joined 2 years ago, huh... and he’s the Toad, which is the gu that’s supposed to be able to overcome the Centipede. HMMMM.