For the question thing: 8,9,13,15
Are they a quick thinker or do they need time to sort through their thoughts?
Kenny is a bit of a mixture. While he can easily think light on his feet, emotional issues require long periods of isolated silence for him to sort through it on his own. If he can remove himself from a situation emotionally, he can get ten steps ahead of everyone else.
Does your character dream or are their nights filled with an empty blackness? Describe a dream they’ve had or a night they couldn’t sleep and what they did to preoccupy their time.
His dreams are more often confusing nightmares involving his sister and his friends, dying in gruesome fashions or himself slowly dying as the world around him passes by, without mourning his loss. Kenny never remembers every detail, but when they happen he ends up waking in a sweat. After confirming his sister is still in bed, safe and sound, he might wander around South Park until dusk or, if he just doesn't feel like trying to sleep on his own, kills himself quickly so that morning comes.
Have they ever been so overwhelmed they had to stop and take a break from something?
More often than not, Kenny feeling overwhelmed comes from things that require large amounts of patience. He doesn't have the capacity to focus on one single piece of homework nor can he dedicate a whole night to studying like Kyle and Stan often do. His "breaks" happen more often than the actual work itself. In class, if the work becomes too frustrating, he'll just up and leave without the teacher's permission and cool his head off either outside the school or in the empty hallways.
Can they multi-task or must they focus on one subject at a time?
If Kenny cares enough, he can put his whole focus onto anything and it'll probably turn out exactly as he envisions it. An example would be one of his many "roles" in the games he and the rest of the boys have played; he takes being Princess Kenny and Mysterion seriously, and while in these roles he will never break character (with the exception of finding out his parents were in a cult, you'd break character too). Things he doesn't give a crap about become overall too frustrating to do at all, let alone do with multiple things going on at once.