Tohka Yatogami is one of the main female characters of the Date A Live series and the first Spirit saved by Shido. There is also another personality named Tenka residing inside her, which only emerges when she assumes her Inverse Form. 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 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 which 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 which 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. In her Inverse Form, Tohka's hair shifts into a dark purple-to-white gradient. Her eyes have also reversed its color scheme, turning magenta. She wears a dark violet dress attached with black laces and a set of grayish magenta-and-dark pink plated armor which adorned her shoulders and waist. The dress is open at the back and the front, which exposed most of her skin and a two-layered, knee-length skirt. She also wears a dark violet butterfly-shaped ribbon with pointy edges while Inversed. While in casual attire, Tenka is adorned in a dark purple jacket and a violet skirt complimented with stockings. Unlike Tohka, Tenka lets her hair down without tying it with a ribbon. In Tohka and Tenka's fused form, their hair is completely tied into a ponytail. The right eye is Tohka's while the left eye is Tenka's. Only their right shoulder retains armor with a cape attached, while a smaller version covers their left elbow. The back of the Astral Dress has wings reminiscent of the halo attached behind Mio. Visually, the design looks like a combination of Tohka and Tenka's individual Astral Dresses. 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 sympathize with the AST for wanting to eliminate her for the destruction she unintentionally causes 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 regards to other people's feelings, especially when it concerns Shido and her fellow Spirits. She also initially had a difficulty of understanding the concept of love, not realizing what her feelings for Shido were until Volume 12. It has been shown several times that Tohka has a decent level of sensibility and instinct towards the battle, which arguably is the only thing of which she has any real memories. When faced off against Origami, who had only recently been transformed into a Spirit, she was able to analyze Origami's new powers quickly and came up with the best method to counter them. This expertise could also be the result of her constant battles with the AST until she met Shido. When in agreement to something, Tohka often has a verbal tic of saying "umu", an old-fashioned expression of affirmation. She also has an unusual intonation of long vowels, such as mispronouncing the word date as “Dehto” instead of “Dēto”. 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 was likely born 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 a doing a 'moe moe kyun' pose was a sure-kill move to dominate the opposing side. At times, she is particularly blood-thirsty in combat, relishing a good fight against a worthy opponent like Mukuro or Origami. However, Shido takes notice that deep down her personality isn't too different from how Tohka was initially. Tenka also has a soft spot for Tohka, whom she views as a little sister of sorts. Despite her short temper, she is willing to be patient for the sake of Tohka's happiness. Ultimately, Tenka proves to be a rather selfless person underneath it all, even taking in Mio's Sephira Crystal so Tohka can enjoy her last moments being happy.