The son of Japan's Prime Minister Kururugi Genbu, Suzaku serves Britannia's army and was chosen to test its latest Knightmare Frame, Lancelot. He is Lelouch Lamperouge's best friend and believes that anything that is achieved by use of wrong or illegal methods is meaningless. He became Zero's rival, at first not knowing Zero was in fact his best friend.
I don't think this actually happened in the series, so it's not really much of a spoiler. Gotta love the details of this cosplay though. Great work!
EDIT: Thank you to Alena for pointing me to Team X PRO-JeKCT of Russia! The cosplayer's name is Tasuki, and her make up was done by Nataku. Photography was done by JustMoolti, and you can find the original image here.
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