Kryptonite

Mara has been on Earth since the nineteenth century trapped in suspended Animation as a 4 year old girl until 2005, when the second meteor shower hit smallville. While helping to clear some of the wreckage from the Meteor shower, Mara's ship was found by Kyle Tippet, a meteor freak who'd returned to Smallville to help with cleanup, and his fiancé, Miranda, a nice girl from coast city. The two eventually adopted Mara and brought her back to their home in metropolis. 11 years later, The two are involved in a car crash that kills them both. Clark Kent, being Superman, gets word of the accident involving his old friend, and wants the best for Kyle's daughter, so he calls one of his old friends in Smallville to see if he can find Mara, who has no other relatives, a new home.