✮Kaina Tsutsumi

Kaina is a tall woman with a curvy body. She has long, indigo-colored hair with numerous scattered pink streaks, usually tied in a ponytail with two full shoulder-length strands of hair framing her face. Her eyes are purple with a mauve shade with dark, blue-colored angled eyebrows.

Before working for the Commission, Kaina wore her presumably school-issued seifuku consisting of a double-breasted short-sleeved blouse with a dark-colored sailor-style collar, secured with a light-colored tie and a pleated skirt. She had a bag slung to her side, and her right arm was wrapped with a bandage from above her elbow to just below her wrist. In her flashbacks, she was shown to be far livelier and had an excited and happier expression.

When she started working as a Pro Hero, she had long hair wrapped into a ponytail and secured with a hair clip. Her hero costume was a simple dark bodysuit with two plates underneath her chest and knee guards. She also wore a long scouter over her right eye, shaped like a lightning bolt.

Following her incarceration, Kaina's hair was cut shorter, and she wore a standard red-orange inmate jumpsuit issued to all the prisoners of Tartarus. After her escape, she changed it to a purple sleeveless dress with gold piping around the hem, white zip-up boots with black lines on the front extending to the bottoms and heels, and a metallic utility belt in which she stores her bullets.

During the Final War, Kaina returns and is shown to have scars covering her face after the explosion caused by All For One. Her entire body is covered in bandages, and she wears a hospital gown over the top of them. Kaina is a serious and disciplined woman who does not hesitate to hurt people to fulfill her mission or achieve her goals. She can be very casual and relatively fearless, showing no visible fear upon meeting All For One and even familiarly addressing him. Kaina is direct and ruthless toward her adversaries, firing a warning shot at Izuku and threatening to dismember the young hero should he not come quietly. In the past, Kaina had an optimistic outlook in her desire to be a great hero but was led down a dark path by her superiors, having been trained to kill villains and corrupt heroes, sometimes unjustly, who were threatening to disrupt the order in society. She assassinated criminals who the Hero Public Safety Commission wanted to have "disappear" rather than be handled by the proper legal process. Kaina's repeated killings made her disillusioned, and she soon fell into a depressive state upon realizing that the Hero Commission maintains a fragile and hollow peace at the expense of others while hypocritically justifying that their actions are for the good of everyone. Upon seeing some young children in admiration over her, Kaina eventually reached her breaking point, realizing that the youth of society wholly admire Heroes and wish to become them while not being aware of the bloodshed behind the scenes. While reaching out to shake the hands of said children, she saw how bloodied her hand was and retracted it in horror, not wanting to pass said bloodshed on to them. Upon implying that she wished to leave her post, and receiving a veiled threat to her life in response, Kaina finally snapped and killed her superior.

As All For One had declared, Kaina wishes to see the downfall of Hero Society, knowing just how corrupt it is underneath, and stated that the Symbol of Evil's rule would be preferable over the corrupt system she spent years serving under. She also shows pity to the victims of the heroic society, such as Kai Chisaki, yet is also willing to put his life in danger to distract and gain an advantage over Izuku, knowing how failing to save someone will weigh heavily on a hero's conscience.

Izuku, however, pointed out that Kaina wasn't serious about killing Kai because the trajectory of the bullet she fired at him was off, and he surmised she wasn't as supportive of All For One as she claimed to be because she could've easily fulfilled the contract to capture Izuku without engaging in battle. It is later proven that despite her low hopes and cynical view of society, she still cares about doing what's truly right in the end and that she became a hero with the good intention of helping others. After witnessing Izuku's skill and resolve in battle, as well as how he managed to save both Kai and her with no hesitation, Kaina deems Izuku to be a true hero.[4]

Through the words of Izuku and Hawks, Kaina gains the resolve to stand against the villains. Even after being mortally injured, she managed to reveal All For One's location to the heroes, albeit she didn't know that it was a trap.[5] During the Final War, she willingly put herself at risk to aid Izuku during his battle against Tomura Shigaraki, despite being warned that she could die given her condition, and states that Izuku and Hawks had reminded her of the hope she wanted to represent as a hero. Rifle (ライフル, Raifuru?): Kaina's Quirk allows her to extend a rifle from her right elbow. She loads bullets into the rifle through a hole in her palm. Her firing range is 3 kilometers. Additionally, she can increase the velocity of her shots by dramatically increasing the rifles power output, causing the gun barrel to expand and bulge out, though this does risk the gun jamming.[7]

She can also extend a tendril from her rifle that she can curl up to form a scope.

Rifle also allows her to pluck strands of her bi-colored hair, which she can twist and mold like Epoxy putty and harden to create various types of bullets (such as hollow-point bullets and curving bullets) that are as strong as any ammo. These hair bullets are capable of recording her voice and replaying the message after they hit.