guardian

/ˈgɑrdiən/

a person who cares for persons or property

Chinese meaning: 监护人；保护者

After the parents' death, the court appointed a legal guardian for the child.

父母去世后，法院为孩子指定了一名法定监护人。

Teachers often act as guardians of students' well-being at school.

老师在学校常常充当学生福祉的保护者。