Maddie

Maddie was a human that lived on Earth circa-2552. She appears to have a connection with an ODST that crash landed in New Mombassa.

She is set to appear in Halo 3: Recon.

One of the objectives in the game is tracking down the missing squad members of the player. It is possible that Maddie is one of them.

Controversy
When Maddie was first mentioned in the teasers on Bungie.net, it sparked controversy amongst the British media and on internet forums. The particular frame of "MADDIE, WHERE ARE YOU?" was taken by many as a reference to the missing child Madeline McCann.