Mercy

Mercy is Lex Luthor's assistant and bodyguard. It remains unclear whether she is an android, or merely has a cybernetic arm.

History
When Lex Luthor was called upon to deal with a peace treaty in North and South Rhelasia, he was accompanied by his bodyguard, Mercy. At first she acted solely as his silent personal assistant, but when Cheshire and Sportsmaster attacked, she revealed herself to have a cybernetic laser arm and took an assassin down.