- For other characters with the same first name, see Alan.
In 2013, Chang ran an operation with fellow agents John Le and Tim Sullivan on crippling Shadowspire with help from Amanda Waller, and the organization was exposed as not a Special Forces unit, but war profiteers.
In January 2016, Chang contacted Lyla Michaels and John Diggle, seeking help due to him and the other agents involved being pursued by Shadowspire leader Lieutenant Joyner. As he approached Lyla and Diggle, Chang was shot and kidnapped by Shadowspire operatives. He was later tortured, having his fingernails pulled, multiple lacerations to the knees, a broken arm and contusions before his left eyeball was ripped out. Finally, Chang was killed, while his eye was used to access A.R.G.U.S. headquarters.
- Peak of human physical condition: As a former soldier and agent of A.R.G.U.S., Chang was in top physical condition.
- Expert tactician/Leader: Chang led successful operations on A.R.G.U.S.'s behalf.
- High tolerance for pain: Chang had an incredibly high tolerance for pain, able to presumably withstand Shadowspire's torture.
- Stealth: Chang was able to sneak up on Lyla Michaels and John Diggle undetected.