All 6 Uses

accompany
in
Harry Potter (#3) and the Prisoner of Azkaban
(Edited)

Fudge came back, accompanied by Tom the innkeeper.
Chpt 3

accompanied = joined
Ron stared as Professor McGonagall ushered Harry and Hermione away from the chattering crowd; they accompanied her across the entrance hall, up the marble staircase, and along a corridor.
Chpt 5

accompanied = went with
He accompanied them to the entrance hall, where Filch, the caretaker, was standing inside the front doors, checking off names against a long list, peering suspiciously into every face, and making sure that no one was sneaking out who shouldn't be going.
Chpt 8
The Gryffindor team visited again on Sunday morning, this time accompanied by Wood, who told Harry (in a hollow, dead sort of voice) that he didn't blame him in the slightest.
Chpt 10

accompanied = joined
Wood had given instructions that Harry should be accompanied everywhere he went, in case the Slytherins tried to put him out of action.
Chpt 15 *

accompanied = traveled with
But you were now accompanied by somebody else.
Chpt 17

accompanied = joined

Definitions:

(1) (accompany as in: accompany on the journey)
to travel along with
(2) (accompany as in: the accompanying chart)
to be present with at the same time and/or location -- sometimes provided to make something more complete or better
(3) (accompany as in: accompanied her in the performance)
to perform with
(4) (meaning too rare to warrant focus)