Chantal Zaheva

From Memory Alpha, the free Star Trek reference.

Captain Chantal R. Zaheva was the commanding officer of the starship Brattain until her death in 2367.

The Brattain became trapped in a Tyken's Rift, and a telepathic distress call from an alien entity caused a critical disturbance in the brain chemistry of Zaheva and her crew, causing madness. Zaheva perished when one of her crew stabbed her in the chest with a knife while she sat in her command chair. She recorded several captain's log entries that portrayed her own insanity as well as that of her crew, she suspected her executive officer, Commander Brink, was plotting against her. (TNG: "Night Terrors").

Captain Zaheva was played by Deborah Taylor. Her first name and middle initial were part of the information read out when her captain's log was displayed on a monitor screen.