Leo was the last person you'd assume would get baby fever. Yet here he was, with Percy's little sister in his lap while he gushed over how cute she was and her chubby soft cheeks and her giggles. He was practically a puddle for her.

He was so gentle with her, like one wrong gust of wind could hurt her. And if it did, he might pick a fight with Zeus and win it for her.

The whole time the friend group was hanging out at Percy's house, Estelle was always at Leo's hip, and she seemed more than happy at being with the human heater in the cold weather. Half of the time, she was sleeping. The other half was her fighting her sleep and giggling at Leo's silly faces.