Silver medalist Nurul Syarah Bte Razali clocked 13.18s, just 0.01s ahead of bronze medalist Haanee Bte Hamkah.
Coming in second was Nur Ria Isabelle of Singapore Sports School with a 13.11s effort. Elizabeth's teammate, Bernice Liew, settled for bronze with 13.15s.
Rainer's teammate Mohamed Haziq finished second with 11.88s while Mohamed Ishal Zikang of RI came in third with 12.08s.
Coming in second was Isabelle's teammate Nurul Insyirah with a 27.31s effort while Bernice Liew of Nanyang Girls' High finished third in 27.36s.
Tan Jing Wei of Cedar Girls' Secondary came in second with 1:11.96 while Palada Tang of Singapore Sports School finished third with 1:13.05.
Coming in second was Joyceleen's teammate Vera Wah who clocked a timing of 5:17.80 while Phoebe Kee of Singapore Chinese Girls' School finished third with a 5:18.66.
Jared Chang of Victoria Junior College pipped Randall Choo of Hwa Chong Institution by one-hundredth of a second in the final, taking home the gold with a 14.69s run.
Her timing went under the previous mark of 12.33s, set by Tia Louise Rozario of Singapore Sports School in 2014.