Suzuna looks a lot like her mother and sister. She has big amber eyes with black hair that reaches past her shoulder which is tied in two low ponytails. She is quite beautiful and is considered a raw diamond by Tenryū Arashiyama. Suzuna has an average height and can be seen wearing many outfits, including a pink blouse, a yellow parka and her middle school uniform. Soon after, she can be seen wearing the Seika High standard female uniform as she joins the school.
She is very apathetic and shows little to no emotion, though is actually rather perceptive and known for her deadpan humor. When she gets scared she completely freezes. She appears to be mature for her age, and is very frank, as seen when she openly declares Hinata Shintani's crush on her sister, to which her mother agrees. She also claims that Hinata is easy to read. It was later that Suzuna has a deepening affection towards Hinata. Suzuna is a calm, straightforward and passive person. Her hobby is winning a prize from the magazines, and somehow she always wins. She entered Seika because she thinks family should always stick together.
She and Hinata Shintani have been friends since childhood and affectionately address each other as "Hamburger-kun" and "Cheese-chan", and came up with a "special fusion" called "Cheese Filled Hamburger", although Suzuna claims the fusion has lost its fun as Hinata lost weight.
When she was younger, her father left the family to find his friend because he was shouldering his debt, but unlike her sister Misaki, she does not seem to develop a grudge towards men in general. Instead, she develops a fondness for raffles which would later go on to be an obsession. With an unrivaled luck in winning, Suzuna joins raffles with prices she believes could help her family (she usually enters with food as the prize). She also keeps tabs on shops that are about to have sales on certain items so they could buy it in a cheaper price.
Unlike her sister, Suzuna also excels in cooking because Misaki was always working, which leaves Suzuna with making meals. She learnt some tips from their dad, Sakuya, who is a highly skilled chef. When she was in High School, She always give Hinata a treat and some snacks she made. She enjoys cooking the most
Suzuna is usually seen home, talking with Misaki about contests. She has a kind of hobby of entering the contests, and always winning prizes for them too. She usually brings up about the fact that Misaki and her father left them, leaving them with the harsh life they have right now. Her first appearance occurs late in the manga, while she is a frequent recurring character in the anime. Later, Suzuna attends Seika High as a freshman student. While she is instantly popular with the male population, most of the boys are wary of her being Misaki's sister and they fear that her easy-going personality is a ruse. The Moron Trio were surprised to see Suzuna as Misaki's sister and remarked she was cute much to the annoyance of Aoi.
- Main article: Misaki Ayuzawa
Suzuna usually addresses Misaki fondly as "sis" or "Onee-chan" and appears to have a relatively good relationship with her. The two sisters also look very much alike, except that Suzana has shorter hair than Misaki which she wears in two pigtails most of the time. Suzuna also has a habit of making desserts, which she usually shares with Misaki. Misaki also cares for her sister and is very protective of her, as seen when she tried to protect her from the perverted looking Tenryū Arashiyama. Misaki also advises her not to force herself too much at cooking, as Suzuna has a habit of making desserts. Suzuna also helped Misaki in getting ready for her date with Takumi.
- Main article: Shintani Hinata
- Main article: Sakuya Ayuzawa
- "She's just hiding her shyness, nee-chan's husband..."
- "No, it’s because I feel that a family should always stick together."
- Her first name, Suzuna, means "glauze".
- Her first appearance occurs late in the manga, while she is a recurring character in the anime.