Gan Ning
Gan Ning kills Ling Tong's father, Ling Cao, at the Battle of Xiakou in 203. Since then, even after Gan Ning comes to serve Sun Quan, Ling Tong still holds a grudge against him. Their conflict is dramatised in chapters 67–68 of the novel, and is eventually resolved after Gan Ning saves Ling Tong's life.