Full name: Y/N Rosa Gordon (female) Y/N Noah Gordon (male)
Parents: Jim Gordon and Barbara Kean
Age: 14 (season 1) 16 (season 2) 17 (season 3)
Background: born in the first few years of Jim and Barbara's relationship, they lived happily in Jim's apartment untill they had a falling out. Barbara tried to keep in contact with Y/N while she was in Arkham, hoping that they could bail her out. Jim started his relationship with Lee and Y/N started calling her 'step mom' and Jim started taking them to work which caused them to call Harvey 'uncle'.
Full name: Y/N Julia Bullock (female) Y/N Joshua Bullock (male)
Parents: Harvey Bullock and Scottie Mullen
Age: 17 (season 1) 18 (season 2) 20 (season 3)
Background: After one of Harvey's many one night stands Scottie left baby Y/N on his doorstep, he looked after them and eventually got them an apprenticeship to work on the force with him. Y/N never had a real mother so joked with Jim that he was their mom. Harvey often left them with Fish when he was off on a long job.
Full name: Y/N Gertrude Cobbelpot (female) Y/N Arthur Cobbelpot (male)
Parents: Oswald Cobbelpot and unknown woman