Because her mother was pregnant with her while she participated in the Super Saiyan God ritual, Pan was born with divine ki and an impossible amount of energy! Even though she's only 4 years old now, she can access the power of Super Saiyan God. She's super strong but doesn't have a full grasp on her own power yet. Even at her young age, there's not many people on Earth who offer a serious challenge to her. What could possibly go wrong giving a toddler the power of gods? Don't worry though!