Songline is one of two winners from two runners out of Luminous Parade (Symboli Kris S), who won four races. Luminous Parade is a half-sister to Jeune Ecole (Kurofune), a Group 2 winner.

Second dam Luminous Point (Agnes Tachyon) won five races and was related to three stakes winners in Japan. She is a full sister to the sire Northern River, a dual Group 3 winner, and to the Listed winner Not Alone, and a half-sister to Renforcer (Symboli Kris S), a Group 3 winner placed at Group 2 level.

Third dam Soninke (Machiavellian) was unraced. She bred three black-type winners as well as Reizend (Special Week), the dam of the much-travelled Deirdre (Harbinger), of the Group 3 winner Hrimfaxi and of Lubeck, a Listed winner placed at Group 2 level. Deirdre won the Gr.1 Shuka Sho and the Gr.1 Qatar Nassau S. in 2019 and was placed in the Gr.1 Hong Kong Cup and the Gr.1 Dubai Turf. Another daughter of Soninke is the dam of the sire Logi Universe, a dual Listed winner placed at Group 2 level. Soninke is a full sister to the Listed-winning sprinter and sire Mudallel.

The fourth dam is Sonic Lady (Nureyev), a multiple Group 1 and Classic winner.

Luminous Parade's younger offspring are Sonic Line (Real Impact), a 2-year-old colt, and a yearling who is a full brother to Songline, and a colt by Satono Diamond was born to her on 21 April 2023.