trainbearer
/ˈtreɪnˌbɛrər/
noun
- A person who holds up the train of a formal gown or robe, as at a wedding or ceremony.
- The queen's trainbearer walked behind her, carefully lifting the long velvet robe.
- The bride chose her younger sister to be her trainbearer at the wedding.
- Two trainbearers helped the graduate manage the heavy academic gown during the procession.