In Invincible, D.A. Sinclair is a brilliant but deeply unethical student scientist who kidnaps people and turns them into weaponized cyborgs called ReAnimen.

Who is D.A. Sinclair?

D.A. Sinclair is a young prodigy at Upstate University who specializes in advanced biomechanics and cybernetics. He believes normal humans are weak and that he can “fix” humanity by replacing flesh with machinery, no matter how many lives it costs.

What did Sinclair actually do?

Here’s the core of what Sinclair does in Invincible:

  • He abducts college students from Upstate University in secret.
  • He vivisects and mutilates them in his lab, replacing large parts of their bodies with machinery to create ReAnimen (zombie-like cyborg soldiers).
  • One of his victims is Rick Sheridan, William’s boyfriend, who is captured, torn apart, and rebuilt as a ReAnimen under Sinclair’s control.
  • He uses a control system to command the ReAnimen to attack, including when they fight Invincible on campus.
  • He justifies all of this as “helping the world” and “eliminating human weakness,” showing almost no empathy for his victims.

Invincible ultimately defeats Sinclair and his ReAnimen and breaks Rick’s mental conditioning long enough for Rick to help in the fight, though Rick is left in a horrific state.

What happens to Sinclair afterward?

  • After the campus battle, the authorities do not simply lock Sinclair away; instead, Cecil Stedman of the Global Defense Agency sees his tech as useful.
  • Cecil recruits Sinclair to keep building ReAnimen as a covert black-ops weapon for the GDA, planning to use them against world-ending threats like Viltrumites or even Invincible if he ever goes rogue.
  • Later, Sinclair works on upgraded ReAnimen, including versions made from dead “Invincible variants,” making them even stronger and more durable.

This moral compromise by Cecil becomes a big point of tension between Mark and the GDA once Mark discovers Sinclair is still experimenting under government protection.

In short

D.A. Sinclair is the twisted cyber-Frankenstein of Invincible: he kidnaps people, dismembers them, and converts them into mind-controlled cyborg soldiers (ReAnimen), first as a campus predator and later as a secret weapons engineer for the Global Defense Agency.

Information gathered from public forums or data available on the internet and portrayed here.