Yoriko Kuroiwa

Yoriko Kosaka (小坂 依子, Kosaka Yoriko) is a human and was Touka Kirishima's best friend when they attended Kiyomi High School together. She loves to cook and hopes to become a chef someday.

She is now working as a waitress in a bakery, and is the wife of Takeomi Kuroiwa.

Appearance
Yoriko has short hazelnut hair in a bob-cut and blunt bangs. She has a very kind and pleasant demeanor, always seen wearing her school uniform and a warm smile.

Her hair is unchanged after the timeskip, though she puts it up using a bandana when at work.

After the Clown Siege, she has allowed her hair to grow out almost back to its original length.

Personality
Yoriko is a friendly, sweet and caring girl who is also Touka's classmate and only human friend. Yoriko strives to become a cook. However, as ghouls cannot eat human food, her refined cooking tastes, normally tasty to humans, tastes even more horrible to ghouls than standard food. She cares deeply for Touka and worries over her, but she often enjoys teasing about Kaneki being her so-called "boyfriend." In return, Touka holds her in high regards and surprisingly cares deeply for her too; much like Kaneki with Hide.

Doves' Emergence
When Touka got sick, Yoriko delivered food to Touka's residence, and discovers Kaneki at her place, mistaking him for Touka's boyfriend.

Owl Suppression Operation
Yoriko and Touka make plans to visit the zoo during summer break. After the Anteiku Raid, Yoriko goes to the zoo alone to wait for Touka.

(Anime)
In the anime, Yoriko spends most of her time helping Touka prepare for her university entrance exams.

Rose Extermination
As Ginshi Shirazu and Takeomi go to a bakery (on Saiko Yonebayashi's pleading because she was hungry and said there was a delicious bakery nearby), Yoriko appears holding a tray of baked rolls, calling out Takeomi. She adds quietly to herself; "That figures" when Shirazu asks Takeomi if he knows her he simply calls her by her last name.

Post-Rushima Landing Operation
She greeted Takeomi when he visited her bakery with Saiko and Koori Ui. When her manager becomes worried at the increasing ghoul attacks, she tried to calm him down. She was then surprised when Takeomi asked to marry her, but accepted soon after.

Post-Clown Siege
She was shopping for a wedding dress before turning around when an unknown person calls her name. Later during a confrontation with Touka at re, Tooru Mutsuki pulls out a mangled hand with an engagement ring and a photo of Touka and Yoriko. According to Mutsuki, she was arrested for being suspected of harboring ghouls. It is uncertain if she's alive or killed after her arrest. However, this was later revealed to be a fabrication, possibly made from Tooru in an attempt to nettle Touka, where Yoriko was fine during her marriage.

Touka Kirishima
Yoriko has been close to Touka for a long time and she seems to support Touka in the same way Hide does with Kaneki. Touka also cares deeply for her friend and defended her against some classmates who tried to bully her. Yoriko is not aware that Touka is a ghoul, however, and often brings her food or tries to get Touka to eat with her at lunch.

Since the destruction of Anteiku, they have not seen each other. Yoriko tells this to Takeomi and he is investigating what happened to Touka.

Takeomi Kuroiwa
Takeomi was Yoriko's classmate in elementary school for several years, although he often transferred because of his father's duty. Both of them still remember each other. She noted that he never talked much but had a strong presence and was incredibly athletic.. Takeomi eventually asks Yoriko to marry him.

Tooru Mutsuki
The two are never really seen interacting, however Mutsuki does present what is supposedly Yoriko's mutilated hand. This shows that Mutsuki has little concern for her well-being and sees her as a means of hurting Touka. Later it is revealed Mutsuki never harmed Yoriko and it was simply a ruse to try and provoke Touka. He does however express some jealousy at her and Takeomi's wedding.

Powers and Abilities
Yoriko is an ordinary human, living a peaceful life. Her only notable skill is her exceptional cooking.

Trivia

 * In Tokyo Ghoul Trump, she is featured as the "Four of Hearts."