It is the maid of honor’s responsibility to attend to the bride in the days leading up to the wedding. The usual duties of grooming, making sure the bride looks her best and helping with this process. (as we all know the phenomenon that is females always doing things in pairs).
But joking aside, other duties or responsibilities of the bridesmaids might be to assist with decorating, and making sure the wedding is carried out in accordance with the brides wishes.
But it wasn’t always the case. They were always dressed in similar attire to the bride too, but this had a more sinister legend behind it. It was believed that evil spirits might try to curse the marriage. And so it was the bridesmaids role to confuse these evil spirits by looking and acting as the bride did on the wedding day.
This tradition continued through the dark ages, and became particularly cunning around the time of Edward Longshanks reign, where a lord taking the bride into his bedroom on the first night of her marriage was also good reason to confuse the lords with bridesmaids.
In modern times, the roles are equally important. Support, love and caring are all the qualities required of good Groomsmen and Bridesmaids. Support for those in which you love and care about enough to assist them on their day of marriage.