Kori is an overly enthusiastic and spontaneous girl, with an optimistic and cheerful approach in life, which are her biggest and more evident traits whenever anyone meets her. Allied with all these traits, Kori has shown to be extremely playful and pull innocent and harmless pranks on her closest friends, or her fellow guild members, loving specially doing sleepovers and pillow fights. As such, she has a very friendly aura around her, despite her constant sarcastic mouth, and her charm easily attracts people to her, and she quickly befriends them. Kori also can easily believe in other people's potential and tries her best to support them.

Cosmic Dragon Slayer Magic: Kori is adept with her Dragon Slayer Magic and makes use of it in many different ways in combat. As with all Dragon Slayers, she can consume her respective element, with the exception of that which she has created, to replenish her energy reserves, which proves troublesome to her, since her element are all from outerspace as well as light. Due her element being of such nature, she is most likely to replenish herself by using the light similar to a plant, rather than eating it. She incorporates the light she creates into her fighting style, greatly increasing the damage of her blows.

As such, Kori's Magic revolves around the usage of light and cosmic elements that can spout from any part of her body. Kori's ability to eat/use light/cosmic elements, gives her immunity to any magic that uses such elements, such as Loke's Regulus magic, and even Laxus's lightning to some degree, and allows her to spew light rays from her lungs.

By the year of X792, after one year of training, Kori has mastered her Dragon Slayer Magic, as well as the other types, and she is capable of taking out multiple opponents with just one attack, or even launch several spells at the same time, without feeling extremely tired.

• Cosmic Dragon's Roar: Kori's signature Dragon's Roar in which she quickly gathers and releases a large quantity of light, stars and space dust from her mouth at her target. In X792, she learnt to emply other elements and her mastery over this spell made the roar be much longer and taller than usual, and to be more destructive.
• Cosmic Dragon's Claw: Kori engulfs her feet in light and other space elements, increasing the power of her kicks. She can also use the elements, specially the gas, for jet-propulsion purposes.
• Cosmic Dragon's Fist: Kori engulfs her fists in light and punches the target.
• Cosmic Dragon's Wing Attack: This Magic features Kori expelling a whirlwind of light and dust from her arms to attack her surroundings.
• Cosmic Dragon's Crushing Fang: Kori charges and swipes the target with her fingers leaving a wake of light behind as she does so.
• Aurelian Star: Kori crosses her arms, that glow in golden light and charges at the target. By swinging her arms open, the target is struck down by a storm of falling stars.
• Dragon Slayer's Secret Art:
  • Star Chaos: The symbol of a star appears below Kori's feet, and after a pillar of light along with star dust and other cosmic elements appear around her, the same happens to her target, connecting both of them, which brings forth a rain of shooting stars to fall upon the target's location.
  • Aurora Lotus: Kori engulfs her hands and arms in light, and swings them in a circular fashion, forming a spiral above her that trap the opponent into a lotus flower, which along with the space elements, end up blowing on the target, creating massive damage.
  • Supernova: Kori's most recent Secret Art that she used against the Alvarez Empire. Kori charges her hands with golden light and slams the reunited light on the ground, that creates a path to her target, creating a sphere around it. As Kori snaps her fingers, the gas and mass on the sphere explode with a bright explosion, burning and destroying everything on its radius.

Dragon Force: By consuming light directly from the sun/sunlight with a high concentration of Ethernano, Kori has been shown to be able to enter Dragon Force. This ability is said to be the final and most powerful state a Dragon Slayer can attain, and it has been said that their power becomes comparable to that of a real Dragon's. Kori gains gold eyes and several strands of her hair become white and gold, with the tips curving upwards. The Dragon Slayer also has golden scales, similar to that of Stärnja's that covers part of her arms and legs.

• Enhanced Speed: Through the use of Dragon Force, Kori was shown to have improved her speed, allowing her to strike her targets before they reacted.
• Enhanced Endurance: With the help of Dragon Force, Kori was also shown to have greater physical stamina.

Cosmic Magic: Kori has shown to be able to use Cosmic Magic, as a side effect of her Cosmic Dragon Slayer Magic. Cosmic Magic is a variation of the Light Magic, as such is a type of Elemental Magic that relies not only around the use of light but of space elements as well. She is able to use this type of magic almost effortlessly powered up by her ability of absorbing light. For comic relief purposes, she has shown to be able to also glow as a lamp.

• Aurora Barrier: A defensive spell that gives her the ability of protecting herself. Kori generates a powerful barrier of light and stars, capable of blocking most of magical and physical attacks.
• Golden Constellation: By reuniting golden light and stars on her hands, Kori joins them together forming a bigger sphere of light. From that light, several homing stars are fired exploding upon contact with their targets. In X792, she showed the ability to fire it using merely one hand.
• Shine: The basic spell from Cosmic Magic, which gives her the ability to spread light from her body. She can either send a wave of light that temporarily illuminates a certain radius around her, or can concentrate that light in a specific part of her body, which gives her the ability of making that part glow and illuminate her path.