
Cassie is the Animorph who will kill you kindly, with her apologies.
Rachel, of course, would just flat-out murderize you with her polar bear or grizzly bear or elephant morph, and you would be Dead. Jake would kill you because it was necessary, not because he particularly enjoys it. Marco would make lame jokes about death, then find a way to engineer your death.
Slowly but surely, all the Animorphs are getting far too acquainted…