None of these lines were quoted by Christopher in either this or last episode, whereas Kiriha was quoting his father several times.Kiriha's father: "Don't think you've already lost before you've even begun to fight! Be strong! Being strong is what will make you Kiriha Aonuma!"
Kiriha: "Kiriha... Aonuma?"
Kiriha's father: "Yes! If you aren't strong, you don't deserve to live! Win even if you have to chew on rocks for it!"
Christopher's father: "Stop it! You'll never win by giving up before you even start! You must be strong! Make yourself stronger than your enemies; that's how you will defeat them!"
Christopher: "I must... be strong?"
Christopher's father: "That's right! Being strong is what makes you Christopher Aonuma! Being strong is what makes you my son!"