In 2008, he returned to Smallville as a regular cast member, after the departure of Kristin Kreuk and Michael Rosenbaum.
Kristin Chenoweth | Kristin Scott Thomas | Kristin Hersh | Kristin Ørmen Johnsen | Kristin Silbereisen | Kristin Linklater | Kristin Kreuk | Kristin Cavallari | Kristín Anna Valtýsdóttir | Kristin Nelson | Kristin Mooney | Kristin M. Davis | Kristin Hammarström | Kristin Halvorsen | Kristin Booth | Maria Kristin Yulianti | Kristín Ómarsdóttir | Kristin Omarsdottir | Kristin Krohn Devold | Kristin Hanggi | Kristin George | Kristin Fortune | Kristin Boese | Kristin "Billie" Davis | Kristin Bauer van Straten | Kristin Asbjørnsen | Ann-Kristin Olsen |
Krystal worked as a model in Singapore, Hong Kong, China, Malaysia, Philippines, and upon returning to Thailand in 2008 she got a role in Street Fighter: The Legend of Chun-Li, starring Kristin Kreuk, Chris Klein, and Neal McDonough.
She has been the stunt double for numerous famous actresses such as Lucy Liu, Christina Ricci, Kristin Kreuk and Rachael Leigh Cook.