You're not the only one who felt the same way about their CR, I just really dropped the ball on my end recently. He really could have used all the insight Sanae could have offered, because he's stubborn as hell and he needs to find that acceptance before actually understanding humans.

But thank you for letting me know that he did receive something! He won't take her words to heart at first, but I suspect he'll reflect on that letter with his adopted mother actually being here now.