Love Science (Asami Sato X OC) (Korra X OC)

Suhara and Toph finally got married and started the family they wanted. Both have jobs that involve protecting people and their children try to live up to their expectations. Toph became the first police chief of Republic City and Suhara became the first general of the United Forces.

One of their children, their eldest son, Lu Ten Beifong, is the only firebender of their family. While his sister Lin became a cop like their mother Toph, and Su went to travel the world after being arrested by her own sister, Lu Ten followed his father's footsteps and became a military officer in the United Forces. But unlike Lin, Lu Ten then started his own family like Su, and there, his son, Enji worked to become a scientist and engineer in Republic City.

Disclaimer: I don't own Avatar or any of its characters. Just the OC.