I didn't think he would be a complete kill the Animorphs villain, I mean, especially when he insisted on morphing the golden eagle, there would be signs of antagonism. I thought he was just going to be a part social outcast, not a whole evil person.
Like Terenia said, I wasn't shocked, but I was slightly surprised.
To be honest I thought it was kind of obvious he was going to go wrong.
First off the guy has a bebe gun, a killer cat, and an illegal and deadly cobra. These are before he was in the animorphs and to be honest they are not signs of good character. The animorphs were even unsure of whether or not to let him use the Escafi device.
Second, the morphs he chooses are, well, agreesive he picks the golden eagle because he thought it could kick the other people's butts. The lion is a classic aggresive animal
Also he nearly betray's the Animorphs to Visser three when they are loosing.
He uses morphing for entirley personal means.
Lastly he is aggressive, deceptive and just outright zealous. All of these are the author's complete antithesis of character.