This is the 6331st most frequent Japanese word.
サチエ
"サチエ" (Sachie) is a feminine given name in Japanese.
In this sentence, サチエ (Sachie) is used as a proper noun referring to a person's name, serving as the subject of the sentence.
サチエは学校の先生です。
Sachie is a school teacher.
Here, サチエ is used as a proper noun referring to an individual, functioning as the object of the verb 'met'.
昨日、サチエに会いました。
I met Sachie yesterday.
サチエ is the possessor in this sentence, indicating that the associated thoughts belong to Sachie.