Was heißt »Begleiterin« auf Englisch?

Das Substantiv Begleiterin lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Männliche Wortform

He's my old drinking companion.
He's my old boozing companion.
Leaving the post, he and his companion Niso go to the king.
Chess is a good companion for life.
Antares has a faint companion called Antares B, with which it forms a binary system.
Hope is generally a bad guide, but a good companion.
Tom is the perfect hero incarnate; Björn Eriksson, his companion, whose mistakes and fallibility show him to be a far more human and realistic character, makes him shine all the more.
He was my companion for the time, and no man shall insult my companion, right or wrong, while he is in my company.
I was surprised, therefore, when, one morning in June, as I sat reading the British Medical Journal after breakfast, I heard a ring at the bell, followed by the high, somewhat strident tones of my old companion's voice.
My companion sat silent for some time, with his chin upon his hand, lost in thought.
The hunchback doesn't see his own hump but his companion's.
Sirius is a binary star system. Sirius B, Sirius A's faint companion, is the white dwarf closest to our solar system. It is about as big as our earth.
Let this little book be thy friend, if, owing to fortune or through thine own fault, thou canst not find a dearer companion.
Being very clever and gentle, this dog is a good companion to me.
She will be a good companion for him.
He and his companion asked me to come along with them.