Chapter 5: Tsubaki comes to the conclusion that Ragna's going to die and decides to stay with him until the end, even if it means that Hazama were to find and kill her as a result.
At Fate's Hands
Chapter 15: Ragna cries after he hears that Tsubaki is dead.
Chapter 23: Gesshoku and Tsubaki speaking for what seems like the last time, just before her planned execution
Having pulled a Cast from Lifespan ploy to save Tsu from Relius, Hakumen tells her about his past, and reveals that he's Jin. He says farewell, knowing he won't survive the next battle. He doesn't.
In Time's Eyes
Chapter 5: Rachel finding Valkenhayn's body, and Tsu and Ragna finding her dad's.
