Yuri is accidentally covering for the Forger family.
It had started off as office banter, even the secret police have office banter. Talking with the new about his family, seeing if it's consistent with their own finding to see if he slips up. That's sort of thing.
However as the days go on, everyone slowly starts realizing what exactly Yuri is saying about his sister. No not the odd incestuous undertones, the war fucked up a lot of people and unconscious feelings like that was like the most harmless thing they had going on in the department honestly.
No. It's just the sheer weirdness about it. Like how she once game home covered in blood when hunting mushroom for them to eat when sick with a fever. The fact it wasn't her blood and was the blood of a boar she dragged back into the house would have been an amazing story for a fully grown hunter with a gun! Not a 13 year old girl with her bare fists! Everyone made fun of it until the day he brought back the actual skull with blunt force fractures at the thichest part of the skull.
That shut everyone up.
Then there was the observations. She kicked a man who was attempting to kidnap her adopted daughter into the ceiling of the aquarium they were visiting! He was embedded by his neck! The camera shows it was just a single kick!
Then she punched out a car!
At that point the secret police smiles, nods, and falifies all sorts of reports about Yor and her husband and step daughter so they never ever have to interact with her.
