Audiences were introduced to Tigris, a former stylist, in The Hunger Games: Mockingjay - Part 2. She had an important role in the story, hiding Katniss and her squad during the Siege of the Capitol, but she was still a very minor character in the overall franchise. This made it all the more shocking when the franchise's prequel, The Ballad of Songbirds and Snakes, revealed that Tigris was actually President Coriolanus Snow's first cousin. They were quite close growing up, having been raised together by their grandmother, which left readers with a lot of questions about why Tigris would later aid the rebels who sought to not only overthrow but also kill Snow.
Source：https://www.cbr.com/hunger-games-theory-tigris-snow/
