Origin
Javier and his sister were arrested in their home country Argentina and given to the Post-Human Project. He was experimented on and developed the ability to explode. His sister was recruited to Task Force X as a young child. The Aerie and Wink would witness this, eventually mounting an escape attempt with Javier.
Creation
T.N.Teen first appeared in Suicide Squad (2019) #1 from Bruno Redondo and Tom Taylor.
Suicide Squad
Javier had the ability to generate explosive energy from his body. He confessed to his leader, Osita, that he wanted to do more, but when the team is captured by Task Force X, Javier is used as an example of force. The injected microbomb killed him, but not before he made peace with his death. He found solace in being one less bomb to be used to hurt people.
Powers
T.N.Teen is able to explode in pink energy without damaging his body. The power grows slowly after every explosion before eventually hitting critical mass and needing to explode. His eyes glow pink all the time as a result.