Moonlight Song

Moonlight Song is the only son to Moondancer. Moondancer never really cared for his father, but was merely for "friendship lessons". She took a few tips from Twilight after her visit, and soon after she became pregnant with Moonlight. His father is biologically Flash Sentry, but for the royal guard he thought of it as just a Twilight-fill-in-one-night-stand. 
Moonlight is a fairly stubborn and smart stallion, like his mother. Sarcasm is one of his many tools of the trade. It's one thing he's best at. He lives in Canterlot, with no special some-pony. Or so he claims. He's a student of Sunburst and is good friends with his daughter.