Firefly ends up betraying the team to Cobra. He honestly likes the Joes and has saved him and Stone several times, but he that he still has the potential to come around. Firefly's actions toward Stone at series' end give slight justifications to Stone's beliefs.
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#6
Suggested by
Strider Xanthos
William-Code Lyoko
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Strider Xanthos
7 years ago Report
Although he is not evil and never becomes evil, he got cocky to the point where XANA succeeded in taking him over at the start of the next season. The surprise factor was actually legitimate, because the build-up was so long.
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#7
Suggested by
Strider Xanthos
Varrick-The Legend Of Korra
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Strider Xanthos
7 years ago Report
Even when he begins manipulating and betraying some of the members, it takes them a while to figure it out. Even after he's exposed, he still thinks they're friends. He does eventually do a Heel%u2013Face Turn a good two books later, but he had to earn everyone's trust and forgiveness again because of said betrayal
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#8
Suggested by
Strider Xanthos
Light Yagami for the Police Taskforce-Death Note
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Strider Xanthos
7 years ago Report
Light joined L 's team only to try and successful get rid of them one step at a time.