This is the 7293rd most frequent Japanese word.
乃香
"乃香" is a Japanese given name, typically feminine, meaning "fragrance" or "aroma" with a poetic nuance.
In this sentence, '乃香' is used as a proper noun, serving as the name of a person, 'Ms. Nozuka'.
乃香さんは学校の先生です。
Ms. Nozuka is a school teacher.
Here, '乃香' is used as a proper noun (a name), indicating possession or preference regarding the flower.
この花は乃香が好きな種類です。
This flower is the type that Nozuka likes.
In this example, '乃香' identifies the subject who performed the action of visiting the place, once again as a personal name.