(written from a Production point of view)
Boni Lynn Yanagisawa (born 1 May 1971; age 47) is a stuntwoman and stunt actress who served as the regular stunt double for Jolene Blalock in several episodes of Star Trek: Enterprise. She received no credit for her work. Her costumes from the episodes "Impulse", "The Forge", and "Awakening" were sold off on the It's A Wrap! sale and auction on eBay.   
Yanagisawa was born in Huntington Beach, California and doubled a number of stars, including Demi Moore, Halle Berry, Lucy Liu, Kelly Hu, Tia Carrere, Julianna Margulies, Alyson Hannigan, Maggie Q, and Vanessa Williams (2002-2003 in Boomtown, with Neal McDonough). She is a martial arts expert, holds several titles, and is the niece of Harry Ishisaka, who was a martial arts trainer for several stars such as Steven Segal. In 1995 she has opened a karate school in La Costa, California. Yanagisawa also worked as a flight attendant for several years.
Among her stunt resume are films such as Charlie's Angels (2000, with Kevin Grevioux, Kenny Endoso, Paul Eliopoulos, Paige Brooks, Jennifer Caputo, Shauna Duggins, Dana Dru Evenson, Dana Hee, Nancy Thurston, and Monica Staggs), Hulk (2003, with Regi Davis, Daniel Dae Kim, Victor Rivers, Brian Avery, Joni Avery, Rick Avery, Kevin Grevioux, Darlene Williams, and Ransom Gates), Charlie's Angels: Full Throttle (2003, with Cyia Batten, Jennifer Caputo, Paul Eliopoulos, Anita Hart, Scott Workman, and Tim Trella), Spider-Man 2 (2004, with Kirsten Dunst, Donna Murphy, Daniel Dae Kim, Kelly Connell, Tim Storms, Jill Sayre, Rachelle Roderick, Brennan Dyson, Nicole Randall, and Katie Rowe), Catwoman (2004, with Mark Chadwick, Lauro Chartrand, and Jennifer Caputo), Clint Eastwood's Million Dollar Baby (2004, with Lucia Rijker, Benito Martinez, Tom McCleister, Jamison Yang, Miguel Perez, Marco Rodriguez, Spice Williams-Crosby, Jude Ciccolella, Bridgett Riley, and Rosine "Ace" Hatem), Poseidon (2006, with Caroline Lagerfelt, Denney Pierce, Kevin Derr, Darlene Williams, and Scott Workman), Grindhouse (2007, with Monica Staggs, Christine Rose, and Tom Towles), and Transformers (2007, with Glenn Morshower, Thom Williams, and written by Alex Kurtzman and Roberto Orci).
She appeared also in television series such as Mad TV, Mortal Combat: Conquest (1999, with Kristanna Loken), Six Feet Under, CSI: Miami, Buffy the Vampire Slayer (stunt coordinated by Jeff Pruitt), Without a Trace (stunt coordinated by Dennis Madalone), Joey (2005, with David Mattey), and Day Break (2006, with John Rubinstein, Jonathan Banks, and Michael Buchman Silver).