Gustav Klimt was an Austrian artist and painter of the late 19th and early 20th Centuries, a maverick known for bucking more conservative art schools and their supporters, most of all in his frank depiction of erotic themes. His paintings from his "Golden Era", especially "The Kiss," provide the basis for the memorable opening and closing credits of the Elfen Lied anime series. The closing credits picture is based on Klimt's painting Danaë.

Elfen danae

Side-by-side comparison of Lucy's portrait in the closing credit sequence and Danaë