'she regards him' is a correct and usable phrase in written English.
You could use it when you want to describe the attitude or opinion of someone towards another person. For example, "Based on their interaction, she regards him as a good friend."
She regards him as a fellow liberal Conservative and natural ally.
She regards him as her mentor, and like others remembers working with him as a joyful experience.
She regards him as one of the few who really understands that Europe needs to fundamentally change in order to keep up in the global race.
In clouded moments, she takes him for her late husband; in others she regards him with a stranger's indifference: "This-man-who-they-say-is-my-son settles himself in the blue armchair near the window in the living room.
His wife, Heloise, is French, independent, mostly incurious about the specific details of her husband's profession because she is an heiress; the detachment with which she regards him is almost exotic by our standards of marriage.
She regards him curiously in his ripped, oiled Magic Mike-like splendor with something like a reverse male gaze which ends up in a double-entendre conversation about the size of his penis, which he assures her is larger than average.
But she regarded him with grudging respect.
She regarded him judiciously as he spoke to her.
Despite their divorce, she said she regarded him as a friend.
"She regarded him as one might regard an interesting piece of driftwood washed up on a beach -- would it look good on the mantel?
And Jonah's Biblical name suggests just how eagerly his mother wanted him out of her body, and how ambivalently she regarded him ever after.
