The world thinks the avatar is dead, and Aang is starting to believe them. Post-Crossroads of Destiny

Ever since Toph was young, she just wanted to be amongst the earth. Pre-A:TLA

After the events of The Southern Raiders, Zuko goes to talk to Katara and finds his brotherly instincts kicking in.

Katara finds Aang distracting. Post-The Blind Bandit

Having left his children for two years to help with the war effort, Hakoda felt like he gave up his right to be a father.

Monk Gyatso has to pick up the pieces left behind after Aang's departure. [Companion piece to 'Too Young']

Sokka always thought he knew what it meant to be a man.

Even though her mother cannot answer, Katara still speaks to her. Post-Southern Raiders.

Now that the war is over, Aang wants to be able to spend the rest of his life with Katara. Unfortunately, there seems to be some competition on the horizon.

From becoming the youngest airbending master, to accepting the knowledge that he was the avatar, Aang felt like the world was expecting him to grow up too fast. [Companion piece to 'The Ones Left Behind']

Katara will do anything to protect her tribe, even if it means sacrificing herself. Pre-A:TLA [WARNING: Eating Disorder]