Status Plate

A Status Plate (ステータス・プレート) is a common artifact in Tortus that is used as both a form of identification, and as a way of showing one's current stats of the person it is assigned to.

Description
Status plates are rectangular silver plates that are twelve centimeters wide and seven centimeters tall. They have a magic circle inscribed on them that a person places a drop of their blood onto, in order for it to recognize them as their owner. The plate would then change its color depending on the color of their owner's mana. After receiving their blood, a Status Plate can display the stats of their owner whenever they say "Open Status". It is possible to keep the plate in either an activated or semi-activated mode. There is also a feature that lets a person alter the numbers on display. People would make use of it in order to prevent the wrong individuals from getting access to their information.

Status plates are currently the only artifacts that are in widespread circulation throughout Tortus, and are produced through a mysterious artifact that has existed since the age of the gods. Every year, new plates were produced under the strict supervision and control of the Holy Church.

Applications
A status plate's main function is to take various parameters and quantifies them. It also lists out all the skills that its owner can use. The status plates also double up as identification cards, because of its unique feature of changing its color to that of its owner's mana, thus making it difficult to fake them, or to use someone else's. There is also a function that allows the user to hide their stats and skills for privacy purposes.

Another feature of the status plates is that they can be used in conjuncture with appraisal magic. If someone capable of using appraisal magic analyzes an item within their field of expertise, the status plate will display the information for its user to read.

Trivia

 * Status plates apparently display the name one chooses to associate themselves as, rather than the name they are given at birth. This is evident by Yue's status plate displaying the name that Hajime gave her, instead of her original name "Aletia Galdea Vesperitio Avatarl".
 * In the anime, status plates are shown to have a small chain with a cross-shaped ornament attached at the end. It is unknown if they are included in the light novel.