Nina sighed when she saw Eren wanted to continue speaking on the topic she was least interested in. So she told him everything she had learned about the topic at hand:
"Isaac's strange behaviours only increased as he grew up. Isen got the wind of this thing. The guy was worried about his image more than his grandson's well-being. So he restricted the news about his eldest grandson from spreading.
But ever since Isaac's younger brother Ivor grew up a bit, his troubled self seemed to have vanished. He started behaving like a normal human being."
Nina looked at Eren after she finished speaking. He seemed particularly curious about Ivor's background. So she told the butcher what she had learned about him:
"Ivor on the other hand started becoming more reclusive. He started his ranking practices way early and was seen to be deeply dedicated to them. His natural talent as a ranker also aided in his growth.