While hunting, she wears a rabbit mask and her alias is Rabbit. In Tokyo Ghoul, she was a second-year student at Kiyomi High School in the beginning and a third-year student after the post-Aogiri timeskip. After the timeskip, she returns as the manager of the coffee shop :re.
Her rash attitude comes from having to live a "hard-working" double-life of a human and ghoul identity. As a human, she presents as a normal girl attending school with normal friends and being a café waitress. As a ghoul, she reveals a more reckless and ruthless personality full of hatred for Ghoul Investigator's. This stems from the fact that her family was torn apart by CCG and she had to live a fugitive life until leading a more docile life by attending school. After being separated from her brother Ayato, she grows to appreciate her human life and starts to desperately hold onto it. As Shuu Tsukiyama notes, she had previously looked more dangerous and cold but has somewhat softened up because of her friends and possibly Ken Kaneki's influence. When Touka was fourteen years old, she expressed a much colder demeanor, and displayed a harsh glare, but these traits subsided over the years.
Touka suffers from ornithophobia. This may have stemmed from caring for a bird when she was a child only to be pecked near her right eye that she then covers with her bangs.
After the time skip, Touka possesses a much gentler and warmer personality compared to how she was back then. She is also seen smiling a lot more and greets people politely even outside her workplace. But she can revert back to her old personality if it is someone she is well acquainted with such as Nishiki and Tsukiyama.
Touka is a slender teenage girl noted for being attractive. She has dark straight hair cut into a bob and long bangs that reach her chin, covering the right side of her face. On the outside, she is considered a cute, normal girl that one wouldn't suspect to be a ghoul. Her facial features and hairstyle bears a resemblance to her mother and her brother, to the extent that Banjou thought she was him at first. She normally wears her waitress or high school uniform but her casual clothes are tomboyish street wear. As Rabbit, she wears a long coat jacket, rabbit mask and blonde, or sometimes a pink wig to conceal her identity. After the Aogiri arc, her hair reaches shoulder length, but her signature bangs remain the same. As a child she wore dresses, and bunny hair-clip on the left side of her bangs, and her hairstyle was much the same. However, her bangs at first were brushed to the side revealing her whole face.
After the time skip, Touka grew into a beautiful young woman and has reverted back to her short bob cut. Her bangs are shorter, reaching her nose instead of her chin and considerably bouncier than her previous bob hair cut. Touka's hair has become a lighter color and she has switched to a more feminine style of clothing. She wears a white wide neck blouse with a black apron over the top for her waitress outfit. When Touka's moving around as a "ghoul", she wears trench coats, pants, and boots.
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