Only a true fan of Avatar: The Last Airbender could answer these questions... Can you?

The phrase "everything changed when the Fire Nation attacked" is not only one of the show's most famous lines, it's also a running joke fans use when engaging new content.

After one hundred years of no Avatar, many people had given up hope of ever seeing the Avatar again. When Aang returned, his arrival was met with mixed feelings: some were overjoyed at his return, while others were angry and afraid.

After accidentally burning Katara while learning firebending, he swore off the practice. Over time, he learned to be more careful and accepted a firebending teacher.

Zuko, the banished prince of the Fire Nation, believes that capturing the Avatar will restore his honor. He refuses to return home without being able to say he located and defeated the Avatar personally.

The Spirit Library, guarded by an owl-like spirit named Wan Shi Tong, houses the information Aang needs to time his attack against the Fire Nation. Wan Shi Tong chases them out, angry that the knowledge they sought would be used for war.

Toph, or the "Blind Bandit" as she's known in the ring, is one of the most powerful earthbenders known. Her blindness forced her to explore bending as a way of seeing, and it became an integral part of her life.

Aang was taught how to block and release chakras by the ancient Lion Turtle. Using his newfound knowledge, Aang is able to subdue and defeat the Fire Lord without taking his life.

Aang harbors a very obvious crush for Katara throughout much of the series, while Katara takes some time to view Aang as more than just a child. She initially shows feelings for Prince Zuko, but ultimately falls deeply in love with Aang.

Toph was the only member of Team Avatar without a significant other by the close of the series. Aang and Katara are known to marry after the series ends, but Mai and Zuko are just dating. Same for Sokka and Suki.

Sokka is Katara's brother and is present when Avatar Aang emerges from his protective layer of ice. He's not a bender, but he approaches his position with a sense of humor and a determination to learn fighting skills.

Azula attacks Ba Sing Se with a massive drill. It would have worked had not Team Avatar interfered!

Aang and his friends learned that Sozin's Comet would give the Fire Nation enough power to finish conquering the known world, unless the Fire Lord were defeated first. The characters must accomplish their goals before the comet (here, a ticking time bomb) arrives.

The Fire Nation launched a coordinated strike against the Air temples, resulting in genocide. Aang blamed himself for not being present to fight, but in reality, his survival was key to the continuation of the airbending line.

They're too dangerous to let loose, but Zuko, Aang, and the other fire nation officials decide to let them live. Ozai spends his remaining days in prison, his bending gone; Azula is committed to a mental health institution.

Katara can bend anything with water in it, including human bodies. She learns the skill when she's captured by a bloodbender and is horrified when she must use the ability to defend herself.

The Kyoshi Warriors are young women trained in martial arts. They are formidable in battle, wearing armored green kimonos and metal headdresses. Their weapons include metal fans.

Katara, Zuko and Sokka all lost their mothers; Aang lost both his parents in the Fire Nation attack. Toph is not an orphan: both her parents live comfortably in the Earth Kingdom, but her relationship with them is strained.

Iroh delights in sharing his love for a good cup of tea and happily soaks up the praise his little tea shop receives during his time in Ba Sing Se. He does enjoy a good fight, but only when it's fair or when he can beat up some bad guys.

Two ancient dragons, Ran and Shaw, helped Aang and Zuko master firebending and better understand the source of firebending power. This allowed Zuko and Aang to bend fire without fueling their bending with rage.

Zuko struggles mightily with his "destiny" and is eventually won over by seeing his beloved Uncle Iroh in prison and learning that his grandfather was Avatar Roku. He teaches Aang firebending and fights against the Fire Nation at the end of the series.

The Freedom Fighters frequently made small raids against the soldiers, stealing their supplies and generally annoying them. Katara trusted Jet blindly until she realized that he was happy to sacrifice innocent lives to achieve his goals.

Joining forces with Princess Yue, Aang and his friends manage to save the Northern Water Tribe from an invasion led by Admiral Zhao. Zhao intended to permanently destroy waterbending by killing the Moon Spirit, but was narrowly foiled by Yue sacrificing her life to save the Spirit.

Katara becomes an impressively strong bender, but she's not an Avatar. Aang is the only living Avatar, but he communicates with past Avatars in the spirit world.

Ember Island plays an important role in the lives and backstory of many of the show's characters. It brings up memories for Zuko and Azula, and it's where the Ember Island Players perform an extremely biased rendition of Aang and the gang's adventures.

King Bumi was friends with Aang when he was a child and happily reveals his true identity after Aang completes various dangerous tasks. Bumi is fun-loving and slightly crazy, but also imparts some wisdom to Aang before they move on.

Prince Zuko captures Aang early in the series, but Aang uses his airbending abilities to escape. He only surrendered in order to protect Sokka and Katara's village, so he has no qualms about fighting over open water.

Mai shocks Azula by choosing her love for Zuko over her loyalty to Azula. Mai's tipping point was when she realized Azula would let Zuko die, something Mai could never be a part of.

Iroh voluntarily journeys alongside Zuko to protect him and attempt to form his conscience. In the meantime, he is often seen happily making tea and playing the ancient game of Pai Sho.

Using the Avatar State comes with two big risks for Aang: because he didn't undergo proper training, he won't know how to control the Avatar State until he is much older. Secondly, if he should die while in the Avatar State, there could be no new Avatar: the line of Avatars would permanently end.

She claims that giving Zuko the credit was all so that his honor would be restored in Ozai's eyes, but Zuko realizes that she's setting him up. If the Avatar isn't actually dead, Zuko will be the one blamed for failing.

Aang is as much a pacifist as he can be as the Avatar. He will fight, but he does not fight to kill; he disables his opponents and allows other authorities to deal with them later.

Lake Laogai houses the brainwashing facility run by the Dai Li, Ba Sing Se's secret police. Aang and the gang narrowly escape and proceed to inform the Earth King of Long Feng's treachery.

Zuko assumed the mask of the Blue Spirit when he rescued Aang from Zhao's prison (so he could recapture him later, of course). As a member of the Fire Nation, he couldn't risk being discovered aiding the Avatar.

Aang uses a glider disguised as a staff to glide through the air, propelling it forward with bending. Appa the sky bison is his other ride of choice, along with being his friend for life.

The arrow tattoos that Aang sports are because of his status as an airbending master. When he received them at the age of twelve, he was the youngest airbender to receive this symbol of accomplishment.