Callisto
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Callisto is the boyfriend of Kassia and native of New Caprica. He died during a Cylon atack on that colony, and his body was taken by the Cylons for experimentation. His loss permanently affected Kassia.
Note
The "Battlestar Galactica" video game has its own continuity as a result of its association with the failed Original Series continuation revival in 2001.