Luisa Tindall was a Human female, and the wife of a surgically-altered Klingon agent, whom she believed was actually deceased physicist Elliot Tindall after Kol had assumed his identity.
In 2286, Tindall and her husband visited the Devonshire Excavation because she believed her husband's past was contained at the bottom of the hole. Later that year, Tindall switched her husband's "vitamins" (actually drugs used to make him act Human) with different pills, causing him to lose his artificially-implanted Human identity. (TOS novel: Timetrap)