In spite of his constant worrying (to the point of him being a nervous wreck) and his tendency to feel "allergic" to everything around him (dub only), Joe has a strong sense of responsibility. In many instances, he takes it upon himself to be the voice of reason within the group and tries, often without success, to steer the other DigiDestined away from reckless action. He is often perceived as being a "stick in the mud" and his "safety first" attitude is often the source of teasing from other characters, especially Gomamon, his Digimon partner who feels he should lighten up and look on the bright side of things. Joe is certainly extremely intelligent and although Izzy is deemed as the smartest of the group Joe does appear to have a much more practical knowledge base than Izzy demonstrated by his abilities to administer basic medical treatment and in the third episode of the series use his knowledge of astronomy to try and determine where the group are.
However, his sense of responsibility sometimes leads him into selfless and brave actions. His Crest of Reliability first activated during a battle with MegaSeadramon whom he and T. K. Takaishi encountered en route to Odaiba. Joe was able to save T.K. from drowning at his own expense. Because he was able to put T.K.’s safety before his own, Ikkakumon was able to Digivolve into his Ultimate form Zudomon for the first time. Also, shortly after the DigiDestined returned to the Digital World and Mimi Tachikawa lost the will to fight due to the untimely death of a few close Digimon allies, Joe decided to be the one to stay with her so she wouldn’t be alone. Whilst escaping from Piedmon across a chasm with rope swings that required the digidestined to go one at a time, Joe remained until last to ensure the others safety ahead of his own. Additionally when Piedmon caught up with them, Joe effectively sacrificed himself by using the last seconds before he was captured to try and get Izzy to safety instead.
the digidestind and their digimon now are worshiped by jungle people in an uncharted of the digital realm, at some point, they encountered Sam, Max, and a few others and ever since, then lead to a new found partnership to the shell louge squad.