Character evidence refers to testimony or documents that are intended to show a person's character traits, often used in legal proceedings to prove or disprove a party's behavior or credibility. This type of evidence can be particularly contentious because it may lead to unfair prejudice, as juries might be swayed by a person's character rather than the facts of the case. The admissibility of character evidence is generally restricted and regulated by specific rules to ensure that it serves a legitimate purpose in the trial.