This is a list of minor characters who have appeared or have been mentioned in the Sonny series. This includes Sonny, Sonny 2 and Sonny (2017).
Sonny 2[]
Gordon 'Fast-Hands' Smith[]
Gordon appears as the shopkeeper in New Alcatraz.

Gordon's reflection on the bars for his cell.
Andy[]
Andy appears as an Agile Convict in New Alcatraz's third stage.

Johnny in New Alcatraz.
Frank[]
Frank was an inmate in New Alcatraz, brought up by a Brutal Convict in the third battle to remind the inmate alongside him what happens to those who trust outsiders and fall for tricks. He most likely became Frankie.

Frankie, likely what remains of Frank after he was experimented on.
Johnny[]
Johnny appears as an Brutal Convict in New Alcatraz's fourth stage.

Andy in New Alcatraz.
Carl[]
Carl appears as an enemy Priest and Cult member in Oberursel's last stage. Despite his connection with the Cult Leader, or the degree to which he believed in his teachings, that led to him sobbing when he learned the truth, he decided to leave with the others.

Carl in Oberursel.
Ed Spencer[]
Ed Spencer is a collector of antique artifacts and was a passenger on the Ivory Line train when Clemons Bugiel showed up and massacred those on it. He survived, remaining on the train and eventually meeting Sonny and company. He warned them of the dangers of going further down the train and sold them items from his collection due to the tough financial times. He endured the crash, complaining about it, and once again sold them his items.

Ed Spencer on the Ivory Line train.
Miller[]
Miller is one of the Tunnel Workers who encounter and rescue Sonny, Veradux, and Roald in Labyrinth's final stage.

Miller in Labyrinth.
Phil[]
Phil, showing up only as a dead corpse in the Cinematic right after Labyrinth, is the cousin of one of the Tunnel Workers. His death acts as the straw that breaks the camel's back and leads to a revolt against the ZPCI rule in Hew.

Phil's corpse as seen in the Cinematic.
Sonny (2017)[]
Officer Aurox[]
Officer Aurox was a ZPCI officer during a ZPCI AGM where it is implied that he had sexual intercourse with Lieutenant Farsight so that she could further her ZPCI career.