Touka is the firstborn daughter and primary heir of the current generation of the Tsukioka family. As such, she lived a life in absolute luxury, which includes many expensive and extravagant gifts, enjoying travels to private properties around Japan and private lessons by top-tier educators and instructors.
She rarely, if ever, left the private properties of her family in any meaningful capacity, which resulted in her being completely unaware of how everything works or goes in the outside world. While she was a student at Kumon-mi Academy, Otoha says she was taught in an exclusive classroom with dedicated teachers and other benefits during Touka’s first day, while Touka herself admits that she never was in a class with other girls before.
User met her once during her visit at Osako’s dojo in First and Second. After the collapse of Kumon-mi Academy, she stayed in the manor, as there’s no mention of her being migrated to Kumon-mi High. After Nodoka and Otoha joined User’s class, Makoto informed him that he will receive two more girls with special circumstances. One of these was the daughter of the richest family of the city as he was specifically requested by the girl’s mother, which he could confirm was Tsubasa, though, at the time, he didn’t understand why she wanted him as her daughter’s teacher considering what she knew about him. Touka joined the class shortly after.
At first, Touka comes across as a rich girl stereotype – a description she admits fits her ‘depressingly well’. She’s highly educated, eloquent, focused on status, thinks highly of herself and her family, gets easily upset when not getting her way, uses money or her status in an attempt to receive special treatment, lacks any real life experiences to the point where she struggles with common appliances, like a vending machine, and is rather gullible when she learns new things about the outside world. Most of those qualities are a result of her sheltered life, but once she started attending User’s class and spent more time with other girls, those characteristics either came up less or disappeared entirely.
Despite having a lot of things due to her wealth, the one thing she didn’t have was friends. She was unable to make a single friend in her old school due to her status and, because of her reputation and first impression, she had a hard time getting close with the girls in User’s class. As a result, she was feeling lonely during her early days. It’s a big reason why she was happy whenever she was included in social interactions. This is another quality that became less prevalent as time went on, though it’s a big reason why she feels sympathy for Yasu, who has an even harder time making friends.
After the initial barrier of her status faded away, Touka shows that she is actually a kind, open-minded and mature person. Her kindness is both a great strength and her biggest weakness, as it makes her an easy target for being toyed with, something User loves to do whenever she gives him an opportunity, but it also helps her to overcome her initial impression as a "princess" and she gets closer with some of her peers.