Can you figure out this mystery?

So I thought of the first one during church surprisingly. If y'all have ideas please share them and if they are appropriate then I will make a story based on it. This is a Pg book. These characters are canon 14 they may be aged up for specific stories but not because there will be inappropriate scenes. If you put an inappropriate comment or storyline then you will be warned but more then once you will be asked to leave. Hope you all enjoy Disclaimer only the ideas belong to me unless other wise said. None of the art or characters are mine. Unless said otherwise.