The phrase "solid character" is correct and usable in written English.
You can usually use it to refer to someone who is reliable, dependable, strong, and trustworthy. For example, "He is a man of solid character; he has never let us down."
"He's got a great heart, a solid character, an adventurous spirit and a cute accent".
"He is a solid character around the group and one of the most determined guys I've ever played with.
He had also, up until "Airplane!," been a sober and solid character actor, mostly on television, sometimes playing heavies, sometimes figures of bland authority.
Smith was required to perform a number of household chores, and Sellers screened his friends, making sure they were of solid character.
At Webster Body Auto in Somerville, where Anzor worked eight years ago, workers remember him as a hard worker, a "good body man" and a solid character.
A fine actor who looks a bit like Jack Nicholson, Mr. Volle reveals Sachs's personal flaws — his quickness to show temper, for instance — while leaving no doubt about his solid character.
"The one thing this lad has got is a solid, strong character".
No one ever deepened a passion for reading by learning to see literature purely as a function of how language undoes metaphysical presumptions or of the gendered economics of its period, or even as a good, solid, character-building exercise.
We had some real solid characters to point us in the right direction".
Solid characters emerge as well from "Late Night in the Women's Restroom of the Jungle Bar" by David Riedy.
AT first glance, "Cars" seems like a perfect antidote to this: a big hit with solid characters, an evocative folksy locale and plenty of merchandising possibilities.
