While it might not look like it on the outside, there are 10 floors underground. On the 10th floor, Sheila is hospitalized in a special room.
Anos Voldigoad and Misa Ilioroagu sneaked into the clinic using Fusca to meet Sheila, Lay's adoptive mother. Once in there, they learned about Lay's past and the reason why he joined the royal faction. Anos then used Lilia on Misa to help stabilize Sheila's condition, but had to leave soon after he detected Emilia Ludwell near his mom. When Anos returned, Lay also returned and was able to have one last talk with his mom before she fell into a deep slumber.