1. Dark Serge is actually Lynx inside Serge's body.

2. Once Lynx tapped into Serge's body, he stabbed Kid with her own dagger.

3. I'm guessing Dark Serge would be 16, the same age as normal Serge.

4. Dark Serge uses Lynx's weapon, which is an scythe that almost resembles an anchor.

5. Dark Serge has dark purple hair and red eyes.

6. He used Kid for his own purposes and controlled her for awhile.

7. Dark Serge wears a hat that has a skull on it, and a black suit.

8. Lynx becomes Dark Serge when you reach the top of Draconia Tower.

9. His one more interesting quote he says is "Let love bleed, darker and deeper than the depths of time."

10. Dark Serge has two other names, Wazuki and Fate.

That's all I have for know...look out for more info on Dark Serge!