errand runner; messenger
Refers to a person who runs errands or delivers messages, often in a domestic or office setting. Slightly dated; modern contexts may use 使い走り or メッセンジャー.
彼は会社で走り使いをしている。
He works as an errand runner at the company.
昔の商家では、走り使いの少年がよく使われた。
In old merchant houses, errand boys were often employed.