Inom huvud-TV- och filmkanonen uppträder Ki Mendrossen bara i en episod, TNG: Sarek.
På grund av att en identisk outfit (i verkligheten samma utrustning) användes av en besökande Vulcan arkeolog i TNG: QPid, kan vi anta att kappan verkligen är ceremoniell och antagligen används för speciella tillfällen som möte utländska dignitaries.
Historien registrerar inte om han är en anhängare av Vulcan-filosofin eller bara anställd som medlem i Sareks personal.
Inom EU är det ganska känt om Ki Aloysius Mendrossen. Han visas kort i TNG: Federation . Riker konstaterar att hans första svar tyder på en vulkanliknande kylning.
“What will happen to him then?” Riker asked.
Mendrossen, though human, answered with Vulcan control.
“The effects of Bendii Syndrome are irreversible.” Then, in an afterthought that belied his emotions, he added hopefully, “Medical research is always continuing.” There was nothing more to be said.
I TNG: Avenger (av William Shatner) lär vi oss mer om Mendrossen, inklusive det han är verkligen en följd av Suraks läror:
Spock cocked his head, intrigued, as he recognized the figure. Ki Mendrossen. The diplomat who had served as his father’s chief of staff in the final years of Sarek’s career. He was an officious human, totally devoted to Sarek’s well-being, and possessed of an almost Vulcanlike capacity to focus on details. Though Sarek had never commented upon Mendrossen’s abilities, the fact that the man had served so long was testament enough to his competence.
...
Mendrossen bowed his head in a human expression of shame. He did it awkwardly, as if his years on Vulcan had made him lose touch with his own human heritage.
“For all that I believed I followed in the path of Surak, my logic was uncertain and I do regret my actions.”