Mordred Pendragon

Mordred Pendragon was the child of Morgan le Fay and Artoria Pendragon, the King of Camelot. Due to Merlin trying to help Artoria produce an heir with Guinevere, Morgan took advantage of this moment and had Mordred. In order to gain control of Camelot, Morgan used her magecraft to speed up Mordred age so that she would be accepted by Artoria and claim the throne. Artoria would reject Mordred despite Mordred loyalty to her. This led to Mordred and other knights of Camelot rebelling, which led to the fall of Camelot and both Mordred and Artoria death. Recently, everything has been quiet at Chaldea when suddenly, the Holy Grail from the Camelot Singularity became unstable out of nowhere. Morgan would try to destroy it before it got worse, but the mana within the Grail affected her, aging he up to similar to her father Lancer variant.