Jack

Adaptive
He's very quick to adjust to situations around him, rarely ever being phased.
Spontaneous
He tends to act or speak out as soon as he thinks of something, sometimes causing a very jolting reaction if not expected
Supportive
He's very Supportive and loyal, never giving up on his friends or even strangers.
Energetic
He never seems to really run out of energy, this feeds into his spontaneous nature. He only seems to calm down when he sleeps, but even then he never seems to stop moving.
Confident
He's very confident in his abilities, and tends to ignore if he can't do something.
Reckless
Because of his high energy, and being spontaneous, Lars doesn't think through his actions and ends up being very reckless, usually hurting himself along with others in the process.
Ignorant
He doesn't retain information well unless it's about someone, but even then it doesn't stay too long usually. Due to this he doesn't know much about anything.
Indecisive
He finds it hard to decide on things, usually because he can't focus enough to decide. This doesn't always come into play, but it's very common to not get a full answer from him when trying to make a decision.