Casshern Sins (2008)

S1E11 By One's Calling

Friender finds unlikely allies in a mixed convoy of robots and humans when Casshern gets pinned under a collapsing pile of rubble. The group works together to free him, but their good fortune sours the moment they uncover the one responsible for Luna's death. What begins as a rescue quickly spirals into chaos as old grudges ignite, and the caravan's fragile peace shatters under the weight of vengeance.