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