I really think the season six ender of "Adventure Time" showed what a great hero Finn is and will definitely become. He rushes in to save others/everyone, even if he knows it can cost his own life--and he's just a kid! Think of how much greater a hero he'll be as an adult? :)
AT and characters belong to Pendleton Ward/Cartoon Network.
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TheNextGenHero
He's the hero everyone needs :D