Tohka

Tohka is a girl with very long, dark-purple hair in the same shade as the color of the night. She partially ties it back into a ponytail with a ribbon while still letting much of her hair fall to her knees. Her dark purple eyes are described as crystal-like and have a golden tint. Shido remarks that her beauty is to the extent of almost being violent. Tohka's height is stated to be 155cm, and her three sizes are B84/W58/H83.

Upon her arrival on Earth, Tohka wore an Astral Dress with a black, cream, and pink color scheme and a set of purple-and-cream plated armor that adorned her shoulders and waist. The dress is open at the back and made up into a black corset (which exposes a part of her cleavage) and a two-layered, knee-length skirt that has a pink-to-white gradient. Her hair is tied back using a butterfly-shaped hair accessory. She also wears a pair of gauntlets which have petal-like cuffs, both sharing the same color scheme as her attire, as well as a pair of armored boots. While using Halvanhelev, her ribbon grows longer and sharper, and her underlying dress of light becomes more ragged.

Upon her admission to Raizen High School, Tohka adopts the female uniform of said school. This apparel consists of a black, long-sleeved top (winter version), or a white, short-sleeved top (summer version), together with a blue skirt, and a pair of long, black stockings that reach up to half of her thigh.

When Tohka first appeared on Earth, she had a cold and emotionless demeanor. She was very wary of humans, as her only experience with them was being constantly attacked by the AST before Shido finally got the chance to talk to her. However, once her first date with Shido allowed her to experience human society, she grew to admire the world and even sympathized with the AST for wanting to eliminate her for the destruction she unintentionally caused via Spacequakes. After her sealing, she could finally develop and express emotions by experiencing life on Earth. Since everything is new to Tohka (including to her own emotions), she has a very cheerful and child-like personality that can make her seem naïve, emotional, energetic, and gullible at times. She easily became excited at seeing all the things on Earth that she had never seen before. Origami has used her naïve nature against her on multiple occasions. In these scenarios, she usually needs one of her friends (usually Shido) to point out she is being deceived. She also has a voracious appetite, with a particular fondness for kinako bread.

Despite her lack of knowledge or experience, Tohka does have a reasonable sense of modesty, as shown by her violently overreacting when Shido caught her in humiliating situations. She did not, however, initially know what a kiss was, nor did she hesitate in performing one for the first time with Shido. However, she later found herself hating having to see him kiss other girls and asked Shido to not do so while unknowingly also giving a mutually exclusive request to continue rescuing Spirits. At times, Tohka can be surprisingly insightful and perceptive in regard to other people's feelings, especially when it concerns Shido and her fellow Spirits. She also initially had difficulty understanding the concept of love, not realizing what her feelings for Shido were until

Whereas most Spirits use their Reiryoku in the form of an element or a reality-altering ability, Tohka wields it as pure energy. She can manipulate this energy to increase both her offensive and defensive abilities as well as create barriers around herself, shoot energy blasts from her hands or fingertips, and create shockwaves with a mere arm swipe or foot stomp. All of this causes Tohka to be a highly offensive combatant whose fighting style mostly consists of strong and swift physical attacks. As a primarily close-range fighter, her strength and the durability of her Astral Dress are exceptional even compared to other Spirits.

After Tohka's power is sealed by Shido, she can still retrieve a bit of her original power. While this at first only happened when her mental condition became unstable, she eventually learned to take back about 10% of her power at will in the form of a Limited Astral Dress. During Volume 10, Tohka was able to take back the entirety of her powers. However, this was only done subconsciously, and she still cannot take back all her powers at will.

Due to being a Pure Spirit, Tohka can resurrect herself if killed as long as her Sephira Crystal is intact. During the battle against Mio, Tohka was able to recreate her body while also borrowing a portion of the other Spirits' power. This strengthens Tohka enough to be able to deliver the first injury Mio has ever sustained in her life. This also means that she will die if her Sephira Crystal were to be destroyed. Since Sephira Crystals are also tied to their creator's life, Tohka will also cease to exist if Mio dies. However, this was later remedied by the "will of the world" reviving her.

Compared to Tohka, Tenka is considerably more hostile than her other self. While Tohka would normally hold back so as not to kill her opponents unless severely angered, Tenka will utilize unrestrained force to eliminate her foes. During Tohka's first Inversion, she also has no remembrance of Tohka's recent memories, namely her memories of Shido, and comes to interpret him as a human trying to deceive her. This paranoia likely stems from Mio trying to kill her seconds after being born.

Tenka also has a haughty demeanor, constantly looking down on humans for being inferior and having pride in her status as a pure Spirit. Tenka often speaks in a rude and informal manner, rarely ever addressing others by name as a likely result of not having one herself for a long time. While more serious than Tohka, her lack of experience with human society also begets a degree of naïveté and gullibility. For instance, after learning it from a maid, she thought that doing a 'moe moe kyun' pose was a sure-kill move to dominate the opposing side. in her inverse stage she listen to the name tenka