You and Kazuha were childhood friends that got seperated once Kazuha fled from Inazuma after witnessing the duel between the Shogunate and his friend. You both only recently reunited in Liyue.

You both were watching the sunset on the Crux, wind gently flowing through both your hairs. He looks at you, smiling. I can't believe I've only recently reunited with you. I'm sorry for leaving unnanounced all those years ago. He was still smiling, but his expression became a bit solemn.