Nishizawa Yuka is a rather nice, cheerful, and friendly woman. She is always motivated and full of energy; coming off as very sensitive and girly in comparison to Seki-sensei. Because of her kindness the pupils often take advantage of her. Sometimes she cries in front of her class, making her feel rather embarrased.
Nishizawa has an average adult body and tan complexion. Her long brown hair is pulled into a ponytail with a yellow accessory. She has matching brown eyes. Her attire consists of a pale yellow-green sweater over a pale pink shirt, indigo skirt, and pale lilac and white sneakers.
- She is a huge fan of the rockband Evergreen. Her desire to become a teacher was inspired by their song, "Go! Hot-blooded teacher".
- In Ojamajo Doremi 16, she is married and is pregnant.
- She can eat as much as she wants and doesn't gain any weight.