Barry is a male Earthling with blonde hair and blue eyes.
Barry shows a vain and narcissistic personality, caring only about himself. He also shows a sadistic side, wanting his stunt double to take a new, extremely dangerous stunt at a whim, and being angered when Gohan replaces the original stuntman, and effortlessly completes the stunt. He also excitedly forces Cocoa Amaguri to blackmail Gohan into leaving the film, gleeful about how he could easily destroy Cocoa's idol career at the same time. It is also implied that he is a psychopath, as he generally relies on his charm to get what he wants and is a prolific liar, as well as harboring absolutely no remorse for any misdeeds. Overall, deep down, he is extremely evil. This is especially evident when he was possessed by the evil-amplifying parasitic criminal Watagash, where he managed to completely overpower Base-form Gohan, thus forcing the latter (while still acting as The Great Saiyaman) to go Super Saiyan to stop him.
Dragon Ball Z
Majin Buu Saga
Main article: Majin Buu Saga Barry Kahn is shown in the magazine from a young lady that Majin Buu meets while on a killing spree. Majin Buu morphs his face into the face of this "Super Star" to impress and make the girl kiss him, but he fails to do so, only terrorizing her. He is an A-list actor.
Dragon Ball Super
"Future" Trunks Saga
Main article: "Future" Trunks Saga
In Dragon Ball Super, he was cast to play Great Saiyaman and gets jealous of Gohan being married to Videl and gaining all the attention as his stunt double in the movie. Then, after trying to frame and blackmail Gohan into being seen as having an affair with Cocoa Amaguri, and exposing him as the real Great Saiyaman, he is possessed by the space criminal Watagash while on set for the Great Saiyaman vs Mr Satan movie. He tries to kill Gohan, although Gohan ultimately defeats Watagash, freeing Barry from the possession. Cocoa then makes sure Barry's blackmail will never happen, by threatening to expose that he was the monster Gohan fought.
Barry Kahn Heteromorphism
Main article: Watagash
Barry Kahn is infected by Watagash and is powered up by his hatred of Gohan. In this form he becomes more muscular, has red eyes and he gains the cotton ball. Similar to other people infected by Watagash, Barry Kahn's shoulder blades were also shown to possess small spines.
A form taken on by the infected Barry Kahn during his battle with Gohan, in this state his head changes shape, he grows larger, and he gains blue hair over most of his body. His power is comparable to base Gohan's in this form.
The final form took on by the Watagash-infected Barry Kahn, in this form, he becomes a huge monster bearing no resemblance to Barry's normal form, his body becomes blue, he gains horns on his head and he possesses huge red eyes. In this form, he is capable of easily taking down base Gohan, but is in turn easily defeated by the Super Saiyan Gohan's Super Great Saiyaman Beam.
- General Blue's redesign in Dragon Ball: The Path to Power is very similar to Barry Kahn.
- In the Dragon Ball GT episode "Collapse From Within", Majin Buu morphs his face into a style similar to Barry's yet again when trying to avoid detection.
- Barry being a villain in Dragon Ball Super is somewhat ironic considering that Majin Buu was a villain at the time he morphed his face into Barry Kahn's to impress a girl.
- Barry Kahn possessing a very evil personality is odd, considering that Porunga was supposed to exempt "those who are the most evil" during the Majin Buu conflict. However, it should be noted that other evil people (most notably Frog Ginyu who is alive in the Golden Frieza Saga) and Earthling criminals who appear in Z (namely Pit Bull Pete), Super and GT are shown to exist. One possibility is that Barry Kahn was not evil during the Majin Buu conflict, as he could have become corrupted by his fame and celebrity status after being revived. Another possibility is that at the time he was not as evil as he later became (for example he may have just been an arrogant jerk during the Majin Buu conflict and his personality became more evil as time went on).
- Barry Kahn is similar to Eddie Brock/Venom from .
- Both are well known for their jobs (as an actor for Barry and as a photojournalist for Eddie) and have a similar appearance to each other.
- Both are shown as the opposite/rival of their co-workers (Son Gohan for Barry and Peter Parker for Eddie).
- While their co-worker is quiet and reserved, but a strong, independent, and self-righteous man inside, both Barry and Eddie are the exact opposite: loud, obnoxious, but appears as more outgoing, confident, carefree, and overall easier to socialize with. However, they both have a weak interior inside: both are incredibly selfish, arrogant, and have no redeeming qualities whatsoever, overall being extremely evil deep down.
- Both were bonded with a parasite who feeds on negative emotions after being humiliated by their rival, motivating them to get revenge on their former co-worker.