In Wake Up, a Minecraft fan-fiction, the villagers in Casper and Sky's town are not testificates, but in fact villagers from the Better NPCs mod. This is because I do not like the Squidward villager testificates.
In Steve, there's all manner of backstory. Steve, our protagonist of sorts, lived in an era where at fifteen every girl and boy had to consent to a virtual reality to test their stamina in battle, and if they didn't beat the game, they had to come back next year to try again. Steve, at twenty, had never completed his game, and the social pressure from the people around him -- "Why aren't you working yet? You're twenty, you should have a job." -- has taken its toll on his health. He's spent most of his life as a bottom-of-the-tank alcoholic and would have eventually committed suicide if the Game had not taken him first.
Superheroes was based off of a very old story idea I had, when I was thirteen and visiting my grandparents. It's about a little alien boy, captured by a rural research facility, whose only care is to get home unharmed and unchanged, because his home (a starship called Arteni) is breaking down and near its end. Basically he's been trying to warn the human scientists that he needs to return home, but human ears can't pick up the frequency of his communication. His name was, in the original short story, Sky. And he had a friend, a baby born with a severe physical deformity, named Nova.
Fly With Me and Strings took place in the same 'verse. However, the protagonist of Fly With Me was nameless because he was a soldier (numbered) whilst Cavi had a name because he was a civilian.