She appears as a young middle school girl with a slender body frame, making her seem boyish in appearance. Complementing this is light colored hair that is bobbed cut.
As to be expected of a girl going to Tokiwadai Middle School, she has a lofty attitude, and have a somewhat teasing demeanor, even on fellow Tokiwadai students. Although, she has shown concern when her trickery has gone too far.
Toaru Kagaku no Railgun
In her debut appearance in the Railgun manga, she and her friends see Kongou Mitsuko gathering people to form a clique. Thinking that Mitsuko must be conceited to form a clique since she just transferred in, Megumi decides to play a joke on her by controlling her fan with her own power, but she unwittingly takes it too far when Mitsuko falls down a flight of stairs. Later, she apparently apologizes to Mitsuko but refuses her offer of joining her clique before leaving.
Daihasei Festival Arc
- Main article: Daihasei Festival Arc (Railgun)
She reappears with Mitsuko in the Daihaseisai during a ball displacement competition with Mitsuko against an obviously weaker school, seemingly having amended with her. After the other school lures them out, Megumi manages to track down Omoshi. Hither, she shows her telekinetic superiority against an assumed fellow telekinetic, haughty and once again boastful of her power. However, she is thrown out of the competition after she eliminates him during her boast, as a fellow comrade of her opponent displaces the ball from her cap. Revealing that he wasn't a telekinetic, and that his comrade was the true telekinetic.
Kirifu Megumi participates in the cavalry battle game in the later days of the Daihaseisai, aiding Wannai Kinuho and Awatsuki Maaya. She holds her along with another Tokiwadai student and notes that Kinuho is light, unbeknownst to her that Maaya used her powers to make it so.
A level 4 telekinetic type esper, she has shown supremacy over her opponent in the field of manipulating objects (several at the same time) using her mind alone.