Escape from Indian Hill
Tweaker was among the Indian Hill experiments that escaped from the prison transfer bus that was supposed to take them upstate. He and the other Indian Hill experiments started wandering the streets of Gotham City.
Joining Fish Mooney's gang
Six months later, Tweaker appeared as a member of the latest incarnation of Fish Mooney's gang where he assisted in the capture of Ethel Peabody. While there, he got into a scuffle with Jim Gordon and was arrested while making an attempt to flee. 
Powers and abilities
- Wing manifestation: After being experimented on in Indian Hill, Tweaker gained the power to create retractable bat-like wings from his back.
- Flight: Tweaker is able to fly using his wings.
- Tweaker might be a loose adaptation of the supervillain Man-Bat, who in the comics was a scientist who inadvertently turned himself into a humanoid bat while searching for a cure for deafness.
- Man-Bat was originally slated to appear in Season 5, but didn't make the final cut. A bat-creature had previously been seen in an unresolved cliffhanger during the Season 4 finale.
- ↑ Heller, Bruno (writer) & Egilsson, Eagle (director) (May 23, 2016). "Wrath of the Villains: Transference". Gotham. Season 2. Episode 22. FOX.
- ↑ Stephens, John (writer) & Cannon, Danny (director) (September 19, 2016). "Mad City: Better to Reign in Hell...". Gotham. Season 3. Episode 1. FOX.
- ↑ https://comicbook.com/dc/2018/05/17/gotham-season-5-batman-villains-scarface-lady-shiva-ventriloquist/