Nearly all characters have one in Turnabout Storm, as per Ace Attorney standards. It gets taken a step further from the games by also giving each witness different Cross Examination and Objection! themes that represent them during the trial sections.
The Harry Potter Septet, composed by Vi Hart and posted to her blog a few years before her YouTube channel became a near-overnight success, contains about three or four character themes that are incorporated into other tracks. Often, other tracks that are in a different movement, no less. Occasionally, more than one leitmotif is incorporated into the same track.