Franky Franklin is an informant who seemingly works at a tobacco store as a front. He gets information regarding Eden Academy's exam and Anya Forger's past records for Loid Forger.
Donovan Desmond is the Chairman of the National Unity Party of Ostania and Twilight's current target. He is the main antagonist of the series.
Yuri Briar is Yor Forger's younger brother and a twenty-year-old man who works in the State Security Service. He keeps his job at the SSS a secret from his sister and instead pretends to be a normal civil servant at the foreign ministry.
Yor Forger is the tritagonist of the SPY x FAMILY series. While she works as an ordinary clerk at Berlint City Hall, she also leads a secret life as a Garden assassin with the code name "Thorn Princess"
Loid Forger is the main protagonist of the SPY x FAMILY series. He has discarded everything about his past to work for his country as an undercover spy who acts under the codename "Twilight"