barrier negation, an ability that allows the user to have a force-field around them in which no superpowers can work. as of recent nam sun's barrier only reaches out about arms length away which means unless you're standing in his personal bubble he's an open target for anyone who has an ability that can be used offensively from a distance such as telekinesis or any of the other abilities in which you can use from far away lucky for him though he's a fairly large person so with this said his bubble is also quite large. this is a growing ability in that as years pass although he is still unaware of the fact that he even has said power it grows in area that it takes up. every year his barrier grows an inch or so larger without his knowledge it's a slow and steady pace, but if he were to find out about it he'd be able to practice and see that he's capable of controlling the amount of ground he can cover.
as for weaknesses because of what was stated earlier he currently has none seeing as he gets older and his body grows everything adjusts to fit for him but once he finds out that he can stretch out his ability to negate powers much farther out, depending on how large a barrier he creates is and how long he decides to keep it up this could lead to fainting spells and illnesses such as high fevers and others that can leave him bed ridden for days or weeks at a time.
for a majority of his teen years and even sometimes reaching to now nam sun believed himself to be incredibly unlucky. at the age of thirteen he had found himself becoming an orphan. his entire family having perished in a house fire that only he barely survived. it was after that accident that he had ended up moving from foster home to foster home his families being unable to control the boy who seemingly had no direction in life.
it was in high school that he had found himself having the hardest time though it was also during this time frame that he had found some happiness in the form of his closest friends. it was at the age of fifteen that he ultimately became the maknae of the now infamous kookie monsters. despite having been once considered a possible mute and a troublemaker with anger issues it was with this group of friends that he was able to bring out his more playful side and even the very rare aegyo filled side of himself that came with the position of maknae.
after high school he took a year off of school but eventually decided to attempt and achieve a higher form of education in which he eventually got in the form of an associates in graphic design, an associates because he realized he didn't actually want to spend four years back in school after the first semester he ever attended. it was after this short schooling he ended up going from one job to another not wanting to live off his hyungs for the rest of his life. despite this he currently has found himself back in kookie monster land and is often found with his group of friends in the shady bar called outbaek, when he's not working at the local supermarket restocking chocopie boxes that is.
personality wise nam sun is known as the rough and tough albeit cute maknae of the kookie monsters and despite the rumors that are constantly floating around about him nam sun is actually kind towards those who are kind to him though don't assume this means he's at all a doormat now. he can still run with the best of them and can hold himself in a fight if ever need be. he's incredibly loyal to his friends especially the hyungs who took care of him when he needed a family the most. despite his usual optimistic look on life though there are still often times when he believes himself to be extremely unlucky and worries that his very presence is the cause of his friends misfortune no matter how ridiculous an idea it may seem.