It's so weird to see the Master having a soft spot for kids. I like it. It's a nice change for him. I didn't know that he had a daughter. I'm stunned. I don't remember it being mentioned anywhere. Unless I missed something.
Author's Response: It's in that episode where Missy and the Doctor are at Skaro. It's when she holds that brooch: "The Doctor gave it to me when my daughter..." And that's we all ever get Q__Q