|Crew of USS Apollo|
- Full Name: McKenzie Kalianna Jaxx
- Race: Betazoid/Gideon Hybrid
- DoB: 238901.30
- Gender: Female
- Father: Andrus Jaxx
- Mother: Tressa
- Brother: Mykel Hunter Jaxx
- Grandmothers: Bjenta Jaxx and Chala
- Grandfathers: Tylon Jaxx and Odavor
- Uncle: Colonel Leton Jaxx
- Great-Aunt: Kidora
- Godmother: Kalianna Nicholotti
- Hair: Blonde
- Eyes: Black
McKenzie was born aboard the USS Victory, the second child of Andrus Jaxx and Tressa. She is younger sister to her brother Mykel.
McKenzie was given the name Kalianna after Kalianna Nicholotti; Commanding Officer of Starbase 118, and close friend to both Andrus and Tressa. McKenzie is often affectionately called 'Little Kali' by her mother.
After Andrus and Tressa split up, she was reassigned to a starbase along the Romulan Neutral Zone. Thinking the children would be safer on a starbase, Jaxx insisted that Tressa take them with her. During a routing survey mission on stardate 238909.27, the ship they were on was destroyed due to a catastrophic cascade failure. With evidence that lifepods were launched, they were considered Missing. To this date there has been no sign of Tressa, Mykel, or McKenzie.