A violent mercenary assigned to the ZAFT forces in the Republic of East Asia, Suu pilots an all-black custom painted ZGMF-1000 Kerberos ZAKU Warrior. A combat coordinator developed by a PMC, but unlike EA's combat coordinator, Suu is designed to have only combat related genes. Furthermore, any genes beneficial to combat are added even though they may have non-human origins. His combat abilities are above expectation, but he does not have any "human" character and is difficult to control. Suu has a record of attacking both allies and foes. No one has seen his real face as he always has his mask on.
- His name means "Death" (死) in Chinese.