Deathbird

Deathbird is a villain from Marvel Comics, closely associated with the X-Men

Origins
Cal'syee Neramani was born heiress apparent of the Sh'iar Empire, but she was denied that right because she had wings, an evolutionary throwback. Because of this, she lead a coup to overthrow her sister, Lilandra. After said coup was defeated, Cal'syee was exiled. Eventually she crashed on Earth and menaced Ms. Marvel and the X-Men, the latter being close friends of Lilandra