This technique allows the user to manipulate nails that channel cursed energy through them.
These nails are sent into the user's target using a hammer to hit them and propel them forward as projectiles. The cursed energy allows the nails to be suspended in mid-air, allowing the user to easily hit them at their intended target.
If the target is hit by the nails, the cursed energy flowing through them can be used to deal further damage. The Hairpin ability can generate explosive cursed energy from the nails once they've pierced the user's opponent as well.
The straw doll acts as a proxy for the user's intended target once they've established a connection with them. Using Resonance, the user can pierce the straw doll with nails and effectively do the same to their target at the same time. This gives the Straw Doll Technique limitless range as long as the user has a piece of their target to establish a connection.
Nobara's innate technique is her primary form of combat. She generally uses it to fight at mid to long-range, sending nails flying at her opponents by striking them with her hammer. Once pierced, Nobara can easily concentrate her cursed energy and expand it to increase the destructive force of her nails.
Hitting mobile opponents like Momo Nishimiya with her nails is difficult for Nobara. Instead, she had to rely on manipulating the environment around her to her advantage, by sticking nails into nearby trees and breaking them. After connecting her straw doll to Momo's broom, Nobara was able to use her technique to completely nullify Momo's innate technique by using Resonance on her broom.
The Straw Doll Technique is also compatible with Black Flash. By concentrating with incredible focus, Nobara was able to apply her cursed energy to her opponent via her nail at just the right time to unleash the sparks of black. This attack was devastating enough to grievously injure Kechizu, a special grade Cursed Womb: Death Painting.