[Considering how nice and open Kaoru is she feels like honesty is the best policy rather than sugar coating. She wouldn't want to feel like she was lying through omission to someone who has taken care of her.]

It was the uniform of my orphanage. [While she talks she sets up her own tools, threading her needle the old fashioned way. Her tone is casual, but the smile is strained. It's always hard to admit without knowing how the other person will react.] It wasn't really an orphanage though. It was a farm where we were raised. The white made it easier to notice any injuries or if we were dirty so that Mama could make sure we stayed healthy. We're premium grade meat after all.

[That is something a few people have already assumed thanks to the identification number tattooed on her neck.]

You had a uniform before too, right? What was it for?