The Chosen Many: It's revealed in the later books that all six were selected as 'players' by the Ellimist in his and Crayak's eternal game across the universe.The 'secret' aspect goes out the window when the Yeerks figure out a means of identifying the Animorphs by blood testing, forcing them to evacuate their parents and go on the run. Because the Yeerks can literally be anyone, the Animorphs are very cautious about seeking allies and even more so when the time comes to look for new members, to the point that their recruits are invariably fellow kids. Naturally, when not trying out new morphs and scouting new missions, they struggle to fit their activities around school, family events, and homework - not to mention the effort of trying to keep their work a secret from their parents. Children's Covert Coterie: A group of thirteen-year-olds operating as a covert resistance movement via improbably valuable alien tech.

They've been fighting a war the entire time. They are sixteen years old when the series ends three years later.

Child Soldier: The kids are thirteen when the story begins.

Break the Cutie: They constantly go through this throughout the war by the end, only Cassie and Marco are stable enough to live a normal life.

Bears Are Bad News: All of the kids can morph to polar bear, which is occasionally used as an all-purpose power morph.

Been There, Shaped History: Through the Sario Rip in Megamorphs #2, they are responsible for the extinction of the dinosaurs.Badass Crew: You have to be a badass to fight a Yeerk invasion for three years while you're in school.While wanting to stop the Yeerk invasion is obviously a good thing, their methods are rather morally sketchy. Anti-Hero: None of them are outright good guys, especially by the end.However, staying morphed longer than two hours causes Shapeshifter Mode Lock. They possess the ability to transform into any animal whose DNA they have acquired (via touch).

Animal-Motif Team: The team fights aliens by turning into Earth animals, with each having a preferred battle morph: Jake uses a tiger, Rachel uses a grizzly bear (or an African elephant), Cassie uses a wolf, Marco uses a gorilla, Tobias suffered Mode Lock as a red-tailed hawk (though he regained his morphing ability, he tends to stay in his hawk body during battles), and Ax uses his own Andalite body.

Animorphs the familiar