A happy Saber began to whistle. Obviously, Shishigou is not permitting her to reveal her parameters. It seems that her statistics and data are only released for the first time when she 'takes off' the helmet while it is 'set' in the armor. Even if she were to remove her entire suit of armor and clothe herself in her modern costume, as long as she does not hold her weapon, the concealment continues to function even without the helmet.

- Vol 1 Chapter 2