Gaia shoved the leg stump in place and focused all her healing power, ignoring the fires and screams, the burning bodies, all around her. She waited only until the skin had reattached at the most tenuous, superficial level—she could not walk on the leg, let alone run—and stood on her remaining good leg and hopped away.

It was an undignified, pain-racked retreat, but no one came after her.

[...]

It took hours of focused attention to grow her leg back. She stood at last, but it still felt too shaky to handle super-speed.

Light, Chapter 14 and Chapter 16