The Junkie Villain is a man with a disheveled appearance, with greasy dark hair almost reaching his shoulders. His face shows a haggard appearance, with noticeable cheekbones, some stubble of beard, and intense glade. He wears a dirty open shirt, pants and dark shoes.
After consuming Trigger, his physique becomes much larger and muscled, his skin turns darker, and have large eyes without iris.
Due to their interactions, the Junkie Villain presents an antisocial and misanthropic behavior, insulting and threatening every person who speaks to him, even if he does it in good manners. He also has mental instability and great dependence on drugs, quickly injecting three capsules of Trigger that Kuin Hachisuka offers him, only to attack her shortly after injecting the drug.
Searching for people with an exceptional Quirk to manifest, Kuin Hachisuka approaches him and gives him a batch of Trigger. The Junkie injects the Trigger into himself, turned into an Impromptu Villain, and attacks Hachisuka but she dodges with ease and encouraging him to fight and leaps away. Then, he starts to attack innocent civilians.
The panic generated causes the Naruhata Vigilantes arrives to stop him. He and Knuckleduster engage in a brutal fist fight, in which despite his Quirk and superior strength, he is defeated by Knuckleduster.
- Unnamed Power Up Quirk: Junkie Villain is able to transform up one of his limbs to attack with a powerful blow. When he is enhanced by Trigger, his whole body transforms fully. He can charge up more energy into his blows to release more powerful punches, but this takes time.