companionable

Can be seen as either slightly sinister or companionable, as in “Me and my shadow.”

I'll take a dip myself, just to be companionable, and tomorrow morning we can get back to any size you like.

I have forgotten a companionable cat who each morning takes her seat on the long leather settee beside me and shares my crescents.

During the first days and nights of his mother's illness, they had talked, or sat in companionable silence, by the hour.

The whole had a combination of companionable good humor, and instant aggression when necessary.

During my absence it had pushed up higher and had spread its branches wider, but it was still the same companionable tree.