Delta is a cyborg with a body made from Shinobi-Ware like Kawaki. Because of this, she doesn't need to use Chakra in order to fight against her opponents and instead relies upon the Shinobi-Ware her body is equipped with. Kawaki didn't even know what Chakra was or how to manipulate it.
Delta is also a master in close quarters combat, able to physically match and fight against a serious RSM Naruto and pressure him despite his own martial talent. She also held her own when it was obvious he was bloodthirsty.
She's also capable of easily piercing his body despite his high resistance towards blades. Said resistance was seen when Toneri's Golden Wheel Reincarnation Explosion failed to cause any damage to Naruto even though he wasn't using his full power.
Naruto, without using any transformations and only a single chakra enhance punch, was able to easily overpower Toneri's attack and Delta took multiple hits from him without a problem while he was using his full power.