She is shown to be one of the more childish members of the group. She is described by one of her teammates that she has never seen Naru praise someone. Like all members of Scavenger, she does her job of killing people and destroying things without remorse or guilt, willing to eliminate those who get in the way. Moreover, she also hates teachers and believes them to be the source of evil in the city.

She also seems unconcerned with being exposed, as shown when she dons her "paper powered armor" that exposes much of her torso with only small pieces of paper covering her private parts. She has no reluctance baring her skin in front of others but she is not an exhibitionist.

She apparently enjoys visiting art museums and likes three-dimensional exhibits.

Naru's Psychokinesis allows her to be able to freely manipulate paper into various forms and shapes. The properties of the papers she uses change as well to have the flexibility of cloth and the strength of hardened alloy - while ranked as a Level 3 when combined with her combat ability she has the skill of a Level 4. She can use it as bombs, cushions, clothes, an armor, shields, spears, darts, hammers, and even an excavator that Naru names Excavator Version. Creating an object as complex as the excavator requires a lot of focus and reduces Naru's speed.

(Source: Toaru Majutsu no Index Wiki)