Discussion Groups / English Usage / January 2007

"Co-ordinator" is usually used to refer to a person whose job is to
make sure that several other people are all working toward the same
end. For example, the "Volunteer Co-ordinator" for an organization
would be the person who assured that all the volunteers were
appropriately scheduled, trained, and assigned, even though the actual
scheduling, training, and assignments of the volunteers are being
handled by three other people.

So it isn't correct usage in the sense you originally asked about.

The term you're asking about could be dresser or wardrobe assistant,
as Chris said, although those are more often used within the
entertainment industry as job titles, and they are more likely to work
for the production company, studio, or theatre than the star.

A dresser is someone whose job it is to assist with costume changes
during the production of a movie, TV show, or play. They don't
necessarily have anything to do with the maintenence of the costumes,
and they wouldn't necessarily have anything to do with the star's
personal wardrobe.

A wardrobe assistant is an assistant to the wardrobe manager. Again,
the responsibility is for the costume garments, not the personal
garments.

If you're looking for the title of the person who is responsible for
the star's personal clothes, it would be either their "stylist" who is
the person who chooses or helps them choose what to buy and wear; this
includes garments, accessories, and other appearance-related decisions
like hair color and style,  manicure and pedicure details, and
sometimes, even weight. But the stylist doesn't maintain the clothes.

If the clothing is the only responsibility of the employee, they're
the ladysmaid, if female; or the valet, if male. If the employee has
other responsibilities, or if they do whatever is asked of them, from
"Take this blouse to the dry cleaners," to "Walk to dog," to  "Go get
me a Starbucks," they're a "personal assisant".

Are you sufficiently confused?