NOTE: This topic is about anime. This doesn't has info about since or tech. It's just some good info if you are weeb
So if you guys come here I expect with the curiosity you came is what is "nen"
Well it ain't that hard or complex thing to understand. I believe you know what it is if you've watched hunter x hunter
Nen is the aura of a person. Every person has his life energy know nen in him
nen has 4 principles:
1. TEN: This is the ability to let the nen out of our body, to cover our body like weightless cloths which protect us from other people's nen
This will only protect if our will power/nen is more stronger then out foe
2. ZETSU: This is the ability to conceal our presence i.e. to not let the nen flow out of pores so that other's can't sense or track us
3. REN: This ability is used to enhance the nen or it is more likely to get will power stronger which mostly this is used before using hatsu and sometimes attacking to increase their attack power
4. HATSU: This ability is like to release the nen outside in a direction. After using ren this is used. This ability is used to make the foe tremble in fear just by demonstrating how strong we are(if user's nen is more powerful than in foe's)
To get protected from hatsu the user must know to activate ten, otherwise hey might due it the foe's nen is continuously flowing towards him
There are more advanced applications of nen are Gyo, In, En, Shu, Ko, Ken, Ryu
Those are just the basics of nen, but every individual belongs to a category of nen, which are
EMITTER: The user can emit his nen and can master this applications of easily
TRANSMUATATOR: The user can change the quality of aura to his wish
ENHANCER: The user can strength them self and objects
CONJURATOR: The user can create objects and command them
MANIPULATOR: The user can manipulate living or non living them
SPECIALIST: This is very unique category which does not falls in above 5 categories