Set two of the characters.
These two are more vague and I can’t tell you their purpose of being.
The mare is dead, yes, which is why you can see in here. I had to include her color scheme like I did because she IS at 70% opacity. Her skeleton, however, is at 100% to make it far more visible without it getting really complicated with a background. The darker the background, the easier it is to see her skeleton. This makes her quite a fright.
The stallion is a kelpie. I know, bleh. He’s in the secondary form which is much more attractive to those in his presence. But no matter what, his mane and tail are always dripping slightly. Due to him not being a normal pony, he does not have a cutiemark. [Please do not try to school me on Kelpies. I have read a LOT on them and since stories are never exactly the same, I have taken the liberty, as the creator of this one, to do what I want.]