Just a story about how the lightsides met Virgil. Each of them have no idea who he is (for what ever reason they just don't recognize him).

Virgil tells them he's a new side (anxiety) so they don't get suspicious. At this point he's Paranoia a known darkside.

Then something happens that causes h to go all spider boy on one of them and he hurts them. Virgil runs away and Patton finds him. Patton convinces him to come back and the Sanders sides ensues.

If I was writing this I'd try to make sympathetic darksides, but that may be hard.