Kaito Sumeragi

Yuito's big brother

The Chief of the OSF and Yuito's elder brother. He is dedicated to following the dearest wish of Yakumo Sumeragi, the complete eradication of the humans still living on the Moon and plans to use Yuito as a weapon to achieve that goal. He also reveals to Yuito that Yakumo is still alive, kept in suspended animation in the depths of Suoh. After the Kunad Gate is closed, he is arrested and scheduled to stand trial for crimes against humanity.

(Source: Wikipedia)