Shamsiel (Hebrew and Aramaic: שִׁמְשִׁיאֵל Šīmšīʾēl, "God is my sun" Greek: Σεμσιήλ Semsiḗl), also spelled Samsâpêêl, Shamshel, Shashiel or Shamshiel, was the 16th Watcher of the 20 leaders of the 200 fallen angels that are mentioned in the Book of Enoch.
[1] Shamsiel is said to lead 365 legions of lesser angels in the Zohar and it is said that he was assigned by God to guard the Garden of Eden after Adam and Eve were expelled; comparable to cherubim.
There is apparently some disagreement in sources as to whether Shamsiel is a fallen angel; he is still regarded as the ruler of the 4th Heaven.
He is a fallen angel living on earth as "Samuel Chia" and is the second in-series victim of the books' primary antagonist Verchiel, who kills him by kicking him from a high window.
A succubus by the name of Shamsiel Shahar is a main character in the erotic visual novel Kyonyuu Fantasy and its anime adaptation of the same name, serving as a benefactor and primary love interest of the protagonist, Lute Hende.