Scáthach

Lancer's True Name is Scáthach, a female warrior-queen from Celtic Mythology's Ulster Cycle. The queen and gatekeeper of the foreign territory/haunted ground called the "Land of Shadows", she is a prodigy of spearmanship and Rune magecraft. She possesses a power immense enough to obtain control over and close the gate of the "Land of Shadows", which is overflowing with countless ghosts, to ward off the dead. It has been said that she became the mentor of Cú Chulainn - who would later grow into the hero of Ulster - guiding him, teaching all sorts of techniques and even bestowing his favorite magic spear. She also instructed his son, Connla.