Complex sentence: The simulations turn out to have very drastic emotional effects on the initiates, but Tris' Divergence appears to psychologically set her apart from her fellow initiates, and while initiation is stressful, simulations are much less challenging for her.
Split into simpler sentences: The simulations turn out to have very drastic emotional effects on the initiates, but Tris' Divergence appears to psychologically set her apart from her fellow initiates. While initiation is stressful, the simulations are much less challenging for her.