It seems Ryuuko's little adventure and Nui's mistake wasn't so easily ignored nor forgotten, as, two days afterwards, I had gotten a visit from a police officer and a social worker (not the same one, thank heavens). Typical of her shyness, Ryuuko stayed upstairs and away from visitors. They spoke with me and the conversation was about roughly an hour. I explained what happened, saying that Nui had left the door open after going outside for a moment and, when her back was turned, Ryuuko had got out.
I was asked a slew of questions, including as to whether or not this sort of thing has happened before, to which I said, "No, it has not, this is first." Sitting down, they asked further questions as to what our life was like and some of our history before. I told them that our mother had Ryuuko in secret and how no one knew of her for years, keeping her locked away in the cellar, along with telling them that our parents had died and that I am my sisters' sole guardian, although I do get help from Aikurou and people I know. I told them that I worked often and is allowed few days off but, today, I am off because of extenuating circumstances.
They listened intently, took notes, and walked around the house, checking and prodding at things, seeing if things were up to code. The last bit of this inspection was to talk to Ryuuko. I guess our baby sister, despite being shy, seemed to sense something about this particular social worker and that she didn't shy away too much from the social worker. As I observed from a distance, Ryuuko was asked questions simple enough to her comprehension along with how she was and what she felt her life was like, to which she had, surprisingly answered (versus hitting or screaming).
As they were leaving, the social worker informed me that all things seemed up to code and that no charges would be brought against me, however, she did tell me that Ryuuko needs medical bracelet before handing me a card for said resources to obtain one.