"steady person" is correct and usable in written English.
You can use it to describe someone who is calm, reliable, and consistent. For example, "She's such a steady person; no matter what happens, she always stays composed and keeps striving for her goals."
He is a very steady person," Clausen said.
"It just seems he is an extremely steady person, and is not prone to any outbursts and tries to put in quality leadership," Mr. Hughes said.
For literary characters planning an over-the-top, socially unacceptable passion, it's useful to have a strong, steady person to confess to -- who can then be counted on to spread a vetted version of the tragic events.
A page headed with the line "A confident, steady grip sends the message that you're a confident, steady person," which comes from a guide called "How Rude!," gets a good trampling by our Miss Information: "When you shake hands with the mayor, / Talk about the weather, / Say, 'Excuse me,' then bend down — / And tie his shoes together".
Elisa and her sister visit their mother often but funds haven't allowed them to offer her either a place in their homes (okay let's just say it's complicated and leave it at that for now) or to have a steady person in her apartment either.
Examples of trait anxiety items include: "I worry too much over something that really doesn't matter", "I am content", and "I am a steady person".
He also offered to teach "a few steady persons, of either sex," if they would volunteer to join the choir.
He was a steady, solid person – he still is.
B. A flashing upraised hand (symbolizing dont walk) signal indication means that a pedestrian shall not start to cross the roadway in the direction of the signal indication, but that any pedestrian who has already started to cross on a steady walking person (symbolizing walk) signal indication shall proceed out of the traveled way.
They waited for the steady walking-person signal indication, then entered the roadway.
Her neighbors and landlady described her as a quiet person, steady, very polite.
