The main event is Zeus' deception. He disguised as Artemis and seduced Callisto. Then, when Artemis found out about Callisto's pregnancy, she turned Callisto into a bear.
In Greek mythology, Artemis was a virgin goddess, and there was no real 'love story' in the traditional sense between her and Callisto. Artemis was very protective of her virginity and the purity of her followers. Callisto was one of Artemis's nymphs. However, Zeus took advantage of Callisto in the form of Artemis, which led to Callisto's pregnancy. When Artemis discovered this, she was furious and turned Callisto into a bear as a form of punishment. So it was more a tragic story rather than a love story.
Kratos is incredibly powerful, but it's hard to say if he's the absolute strongest. Different fictional universes have their own mightiest characters, and it depends on various factors like their powers, skills, and the context of their stories.
The story of Kratos is complex and compelling. He was once a servant of the Greek gods but was betrayed and wronged, leading him on a violent path. As the series progresses, he grapples with his actions and tries to find a way to atone for his sins.
Kratos' height in comics varies depending on the artist's interpretation. But generally, he's depicted as quite imposing and towering over most characters.
One could write a fanfic where Kratos, the stoic and powerful warrior, meets Aphrodite, the goddess of love. Maybe it could start with Kratos on a journey through a realm where Aphrodite's influence is strong. Their encounter could be a clash of ideals, with Kratos' focus on strength and vengeance contrasting Aphrodite's love - centric nature.