This is from fate grand order
Biography
Height/Weight: 154cm · 42kg
Series: Fate/Apocrypha
Source: The Legend of King Arthur
Country of Origin: Great Britain (Romano-British Kingdoms)
Alignment: Chaotic ・ Neutral
Gender: Female
Her physique is a complete match to Arturia.
Mordred is a Knight of the Round Table and the legitimate child of King Arthur. At the same time, the one who put an end to the legend-- at Camlann Hill, the Knight of Rebellion who slew King Arthur.
Mordred is an artificial life form-- a kind of homunculus that was given birth by the evil designs of the witch Morgan, the elder sister and archenemy of King Arthur. In order to defeat Arthur, in order to become a king that could surpass Arthur, Mordred was born.
Since she was a homunculus, Mordred's growth speed was extremely fast and she became a knight serving under King Arthur just a few years after being born. Also, because her abilities were an imitation to King Arthur's, she immediately distinguished herself as a knight.
In contrary to Morgan's intentions, Mordred admired and wished to be recognized by her father, but all that changed with King Arthur's rejection. So in order to trample her father's exploits, she began to hone her poisonous fangs. Britain - which had already reached its limit all along - collapsed along with the clash of these two.
Born as a homunculus, her life span was short as if all affairs passed by her like a gale. Maybe for that reason, she wished to be recognized by the father who she offered all her life to. However, even Mordred was not able to guess Arthur's distress at the time.
Dealing with Mordred is simple. Do not badmouth King Arthur. Do not praise King Arthur. Do not treat her like a woman. Also do not bluntly treat her like a man. Do not behave in stiff manner. Do not become infatuated with other Servants. Properly hear her opinions. Simple, yes?