Source: Battlecry! pg. 10
Archives of Nethys: Jotunborn
Jotunborn were forged from the blood of an ancient group of giants called titans, tasked to watch over the Universe.
According to their oldest stories, the first jotunborn were the direct creations of the earliest gods. Having just completed the majority of the creation of Golarion, these gods created several groups of people to act as stewards for this new world. Among these groups were jotunborn, beings who were formed from the remains of titans who dared rebel against the gods in the earliest days of existence. Rather than give jotunborn the full power they gave the titans, the gods instead instilled the first jotunborn with the faintest spark of creation and gave them slighter forms. These new servitors would be just as capable at helping to shape the rest of Golarion but would also be weaker and easier to strike down should they rebel like their progenitors.
Fortunately for the gods, jotunborn saw no reason to rebel and dedicated themselves outright to their duties. These first jotunborn used their abilities to grow mountains, carve out rivers, and more as they continued to mold Golarion at the behest of the gods. When the task was done, the gods took the first jotunborn and placed them in the space between the mortal Universe and the Ethereal Plane. This sub-planar space sat “beneath” the surface of the Universe and served as the new home for jotunborn. The gods commanded the jotunborn to remain in this realm, watch over their creation from afar, and return to the “surface” of the Universe to tend to it during times of great need.
Now, jotunborn remain mysterious beings whose existence is only briefly mentioned in scattered points throughout history. They are tasked to return to Golarion only when a major disaster—natural or otherwise— changes the world. Jotunborn then appear to assess the issue and determine what steps to take to return the world to a more stable state. This typically only draws a handful of jotunborn to the world. Earthfall caused a mass arrival of jotunborn, though their visit was brief. In the wake of the Godsrain, hundreds of jotunborn have appeared once more. Unlike past visitors, these jotunborn can’t easily return to their home. Now these gigantic humanoids must learn to adapt to life among the people of Golarion.
If you want to play a character who is a towering being with the potential of creation and has a unique connection to planar powers, you should play a jotunborn.