They are friends during their time as a young cadets in War College. They share information, friendly talks and respect each other's opinions.
He likes her undeniably unexpected outcomes and ideas for the benefits of the country. He accommodates the contributions that she always does like using her Thesis as the reference if something big crisis coming up e.g, during the Battle of Arlene where he used one of her Thesis as an advantage to prevent breaking some rules in accordance of International Law to win the battle.
Zettour notes that, if Tanya was a male, he would have happily allowed her to be betrothed with his unmarried granddaughter.