PHILADELPHIA — Follow along for our coverage of the Democratic National Convention.

Donald J. Trump could not resist making a splashy appearance every night of his convention — emerging onstage as a fog-enshrouded silhouette one night, upstaging a political foe from the stands two nights later.

But as Democrats piled on the accolades for Hillary Clinton here, she was not just offstage, or holed up in a nearby hotel suite. She was at home in Chappaqua, N.Y.

Naturally guarded, unusually private and hard-wired to avoid the boastfulness and hagiography that are so typical of political conventions, Mrs. Clinton has seemed, halfway through this four-day celebration of her life and life’s work, a reluctant star of her prime-time production.

It is not hard to understand, when even her catchiest slogan — “I’m With Her” — has been turned against her by Mr. Trump: Stung by his suggestion that the phrase demonstrated that Mrs. Clinton’s campaign was overly motivated by her ambitions, her advisers have urged revising it to “She’s With Us.”