Fremy

from my foster carer:

Frémy is the tortoiseshell female named after a radical salt that was discovered, but not used for over a 100 years. Initially you might overlook her, but once she gets started/noticed, she just keeps going. She looks small but she is very strong and tough and the defender of her weaker siblings. She is energetic and explorative and doesn't stay in the same place for too long unless she is asleep.