Wary Squish  
is a careful and fearful Slimepony who’s never risking anything, even tho as a slimepony it’s hard to hurt her physically. She’s very gentle and if she trusts somepony she’ll be really nice and lovely to that pony, but also she’s pretty naiv and would beleave every lie if they are told well.  
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Her backstory:  
She is a slimepony who was born on an island far away in the east of Fillydelphia.  
Long ago a huge boat landed near the island and the crew entered the small piece of land. They searched for things which they could sell for high prices, and all they found were various kinds of fruits and some beautiful stones. But as they entered a bright lightened cave they found many puddles full of jelly-like water in different colours and sizes on the ground, they all speculated what they were and why they were so colourful.  
One pony of the crew was too curious to resist, and it dipped its hoof into one puddle and licked his hoof, just to realize that the goo tasted wonderful. That’s when the Captain imagined how much money he could get for this goo, so he ordered his crew to collect the slime into barrels, and get them to the boat and that’s what the crew did, the barrels were filled with the tasty rain and the captain himself filled a small barrel with the goo for his own use, choosing the flavor he liked the most himself. What accidentally happened was that a little stone got into the Barrel as well, which in time turned out to be the core of a slimepony, which is its lifesource.  
The captain wanted to sell the barrels on the Baltimare harbour, but the boat crashed and sank before it could reach its destination.  
Only the small barrel the captain wanted for himself was washed ashore on the beach in Fillydelphia outside of the calm beaches near the Forest.
 
After a few minutes Wary opened her wooden prison and looked around, not knowing what happened to her, where she was, and what she was supposed to do.  
She walked into the woods near her and was found by Mercurial Keys there who took the barrel with Wary hiding inside to her home, where Curi opened it and feinted the moment she saw Wary forming from a puddle into a Pony.