Mr. Eko and Yemi, his brother, both at some point wore a silver cross on a silver chain. Originally Eko's, Yemi took it when Eko was taken by the militia. Eko regained it when he took it from Yemi's dead body on the Island. Eventually, he saw a vision of Yemi again ("The Cost of Living") and held the cross at him. It acted as a reminder to Eko's religious past and a symbol of fraternal and religious bonds.