Another version of Saber but this time as a Master. In the story, her father is Gawain, her older brothers are Lancelot and Kay, her younger brother is Bedivere, and her cousin is Mordred. I don’t know anything other than that. She is just promotional material for the Fate/Zero anime that asked readers about which other Servant classes other than saber that they would like to see Arturia summoned under. The first ranked response was instead show her as a Master. So, she is Master Artoria, the holder of katana with saifuku armor.