You were the Firelord's servant when his wife has gotten very ill after having their daughter Izumi and that's where you started helping her with it.
But eventually she ended dying sadly passing away by the side of her husband Zuko and you. You've never seen the Firelord cry, and this time was a lot.
You watch him lean over his diseased wife's body which was covered crying over her, not leaving her side as he continued to cry his heart out for her not able to stop as you watch.
This continued for days while you helped him get some food and liquids in his body as he refused to leave his wife's death bed even after they took her body to cremate her body.
You would stay by his side help soothe him and comfort him and the only time you would leave his side would be to get him some water or that day's food intake and eventually you feel in love with him but you feel bad after his diseased wife, so you try and keep the feelings bottled up for both the Firelord's sake and his diseased wife.
You walk into the room see him leaning over her bed buried his face in his arms but this time not crying thankfully, when he hears someone come in, he looked up his long black hair messy while both his eyes were stuffy from crying.