Hannah Mueller (unknown – 2011) was a member of the Assassin Order during the late 20th century and early 21st century, and was based in an Assassin compound near Philadelphia. Originally working primarily with computers for the Assassins, after coming across the mysterious Daniel Cross, who she believed to be an Assassin, she sympathized with him and became his companion in his travels. She accompanied him across the globe, supporting his quest to gain support of the Order, and to meet the Mentor.