Although at times impulsive and aggressive, Finn is a kind, brave, selfless, and righteous boy. His aspirations to become a great hero makes him somewhat of a moral sheriff in the Land of Ooo, as he is willing to help and protect any innocent person or creature. Finn has a very strong sense of responsibility and becomes upset when he is unable to help others. While he portrays himself as a rough and tough hero, Finn has a tender side that is capable of love and compassion, as shown by his boyhood crush on Princess Bubblegum and his brotherly relationship with Jake. Despite being mischievous from time to time, Finn is a very kind-hearted person. It's shown multiple times that he shows clear concern for others, even for those who have willingly hurt him. finn is 16 now.

Jake is generally laid-back and tends not to worry about things. He relies heavily on his stretchy powers to get him out of any dangerous predicament. While he often cracks jokes at serious times, Jake always has a lecture or a song to cheer Finn up if he is feeling disheartened. Acting as Finn's world-wise mentor and big brother. as jake is an anthropomorphic dog, he walks on two legs. though he can be immature, jake is very kind and caring when it comes to finn and others he loves, not as driven to help as finn naturally is but definitely will help out if finn does.