Drawing on Membership Categorization Analysis, we aim to tease out how narrators talk into being the social group constellations in their storyworlds and how these – potentially shifting – constellations can be related to the narrator’s identity constructions. We investigate two World War II-testimonies narrated by Belgian concentration camp survivors and scrutinize whether the expected Standardized Relational Pair of victim-perpetrator – viz. the camp prisoners versus the Nazis – is in operation, how these two categories are talked into being, whether (...) other social groups are mentioned and how all these processes affect the narrators’ identity work. It proved to be the case that, even though the victim-perpetrator Standardized Relational Pair is indeed present in both testimonies, it functions very differently in both stories, resulting in almost opposing identity work by the two narrators. (shrink)