Emiri is a soft-spoken, well-groomed second-year student with long, light green hair and first appeared in "Mystérique Sign", seeking counsel from the SOS Brigade.

Emiri later reappears as the secretary to the president of the Student Council.
By this time, it is implied that she is Yuki's superior, or at the very least her minder. Emiri is also later shown to work part-time (against the rules of the School Council ) as a waitress in the cafe frequented by the SOS Brigade.

Source:Wikipedia