This is Square 3, the one that got lost in the woods.
Its story is a cautionary tale of what happens when you get lost and forget your way.
Legend has it that Square 3 was once part of a grand square family, but after a fateful night, it found itself alone, wandering in the wilderness.
You can find more about Square 3's family tree at Square 1 or Square 2.
Lost Back to Square 1