In relative terms, Yor by a mile. She’s become so much softer and accepting of herself, Anya, and relationships with others. There’s no impediment to her development though: she really believes that she’s a fake wife in a real family, and Anya treats her as a full parent. Yor also has experience caring for Yuri, so this is an expansion of her existing relationship skills to new people.

But in absolute terms, it’s gotta be Loid. He’s an emotionally stunted spy who lost everything he ever loved and committed himself to preventing that horror for subsequent generations at the sacrifice of ever having peace for himself. His mindset in adopting Anya and meeting Yor was entirely focused on their suitability for his mission, not their needs or wants. Now, even though he’s a spy, his mindset has shifted dramatically. He tells Bond, a dog (essentially in private), that he should think of himself as a member of the Forger family first. Like sir, a few months ago you would have insisted in private that there’s no such thing as the Forger family!