Tessa was a human that really liked n. She wants to destroy the absolute solver by killing Uzi since she has the absolute solver but n doesn’t want to hurt Uzi. Tessa is dead and controlled by Cyn.
Cyn pretends to be Tessa and acts like Tessa. She is pretended to be an astronaut and wants to stop the absolute solver and Cyn hides the body using the astronaut helmet. Uzi has the absolute solver and by getting rid of her it will get rid of the solver.