I'm not sure since we don't have the details, but it could be a lonely penguin that has lost its way.
Once upon a time in Club Penguin, there was a little penguin named Pebble. Pebble had lost his best friend in a snowstorm. His friend was carried away by the strong winds and never came back. Pebble would sit by the shore every day, looking out at the vast ocean, hoping to see his friend return. He was so sad that he stopped playing games and just moped around the igloo all day.
Separation is a main element. Maybe one penguin has to migrate to a different part of the island for family reasons, leaving the other behind.
The main character in the 'Pacheco Sad Story' is likely Pacheco, as the title implies.
As we don't have the details of the story, it's impossible to say who the main character is exactly. It could be an ordinary woman with an ordinary name, like Mary or Jane.
The main character in the springtrap sad story is Springtrap himself. He is the one who endures the tragic transformation and all the miseries that follow.
Since I don't know the specific'sad tiger story', it could be the tiger itself as the main character.
The main character could be Pou. However, there could also be other important characters in the story that contribute to the sad nature of the story. For example, if Pou has a friend or a family member, their actions or fates could be intertwined with Pou's and play a role in the overall sad story.
The main character is probably Daca. In many stories, the name that is part of the title like this often represents the central figure. So in the'sad daca story', Daca is the one whose experiences, probably sad ones, are being told.
It could be a young boy. Maybe he was given a harmonica by his father who then passed away suddenly. The boy's attempts to play the harmonica are filled with sadness as it constantly reminds him of his father.
I don't know. There's not enough information to tell who the main character might be.