noun
props assistant (film)
Borrowed from French 'accessoiriste'. Used in film and theater contexts for the person responsible for props and set accessories.
from French accessoiriste
彼女は映画のアクセソワリストとして小道具を準備した。
She prepared the props as the film's accessoiriste.
noun
A less common, possibly wasei-eigo-influenced usage referring to a person who sells car accessories. Not directly from the French source meaning.
あの店のアクセソワリストはカー用品に詳しい。
The car accessory seller at that shop is knowledgeable about car supplies.