Which preposition to use with trusties

of Occurrences 6%

Why, then, of course, I discharged Rudolph's gatekeeper, put a trusty of my own in his place, sent out to hire a diver, and turned all hands to hunting.

than Occurrences 2%

"Why, worldly hearts are no colder nor less trusty than this," said he.

as Occurrences 1%

Trusty as steel, stands the gaff without whining, backs his friends to the limit, and plays the game out till the last card's dealt and the last trick lost.

under Occurrences 1%

If possible, also, get mare mules; they are much more safe and trusty under the saddle, and less liable to get stubborn.

Which preposition to use with  trusties