Acupuncture/Needle Manipulation

Summary
Needle Manipulation: Characters with this ability are proficient in utilizing needles. While needles by themselves are usually too small to inflict any destruction/damage on a large scale, their sizes make them useful in situations where precision is required over raw destructive power. Since Needle Manipulation is the ability to use needles in various ways, users of this ability are able to (but not limited to):
 * Create needles from scratch.
 * Shape needles into different forms.
 * Manipulate needles from various sources, such as needles prepared in advance. Adjusting said needles' properties (length, width, penetration power, etc.) would also qualify.
 * Other sharp needle-like objects, such as quills, spikes, pins, nails. In extremely rare cases, the use of fingers in ways similar to a sharp needle also apply for this as well.
 * Acupuncture, a sub-ability of Needle Manipulation, is the ability that allows the user to target specific points on the body of an opponent. Proper knowledge of the human physiology allows a user to target an opponent's pressure points, resulting in either knocking an opponent unconscious or even instantly killing them as a result. However, the lack of destructive energy, as well as the users' lack of physical strength means that the user must aim for a person's vital spot, such as nerve-clusters/pressure points for this ability to work properly.

Possible Uses
Needle Manipulation
 * The sharpened tip of the needle can be used for piercing, cutting, throwing.
 * Can impale the opponent if the attack is strong enough, bypassing their durability. This is an important point, as the surface area of the tip of the needle is extremely small in comparison of the surface area of the body/object the needle is aimed at, thus needles are able to pierce through objects much easier in comparison to regular weapons.
 * Acupuncture
 * Able to partially, or completely immobilize the opponent, or make them unconscious
 * Able to kill an enemy by targeting their vital points, such as their nerves, veins
 * Able to increase their own physical capabilities, or that of others
 * Able to cause strange effects to the opponent's bodily functions if aimed at a proper spot.
 * More uses of this ability are explained here.

Limitations
Needle Manipulation
 * The user may only have a finite supply of needles; needles may be stored in advance before combat.
 * The needles may be unable to penetrate defensive properties such as armor and barriers, although a character who is strong enough to throw/slash with these needles can generate enough force that opposing defenses can be bypassed.
 * May be unable to do as much damage to the opponent as other kinds of weapons upon contact.
 * Acupuncture
 * Characters with strong enough passive defense (armor, barriers, etc.) can prevent this ability from working, as acupuncture requires the user to almost always hit the vital points of an opponent.
 * Lack of destructive power and versatility means that this ability is limited to a specific use.
 * Machines, in general, are generally immune to this ability. They do not have pressure points similar to that of humans, thus their vital points can't be hit.

Users
Needle Manipulation Acupuncture
 * Bookman (D. Gray-Man):
 * Haku (Naruto):
 * Shizune (Naruto):
 * Sheik (The Legend of Zelda/Super Smash Bros series):
 * Ten-Ten Huang (Rosario + Vampire):
 * Tenzen Yakushiji (Basilisk):
 * Chelsea (Akame Ga Kill):
 * Minoru Kamiya (Yu Yu Hakusho):
 * Neji Hyuga (Naruto):
 * Practitioners of Hokuto Shin Ken (Fist of the North Star):
 * Tao Pai Pai (Dragon Ball):
 * Ty Lee (Avatar: The Last Airbender):