Ko Sai Ko Sai , a female Kaminoan , was Chief Scientist of the creation of the Grand Army of the Republic . She was a skilled genetic engineer . Biography . Ko Sai was a female Kaminoan , born on the planet Kamino and genetic engineer . She once met with Hego Damask , a Muun individual . Damask brought a Yinchorri subject to Kamino to inquire about using the Yinchorri as the template for a clone army . Ultimately , she and two other Kaminoan scientists were unable to use their science to take out the Yinchorri ' s natural aggression , and the species was abandoned in favor of Humans . By the time of the Clone Wars , Ko Sai became Chief Scientist of the creation of the Grand Army of the Republic . It was her responsibility to ensure that the clones were of the highest quality , overseeing all the biological aspects of the project . She also directed the " processing " of the clones that failed to meet her expectations . Following the First Battle of Kamino , Ko Sai told Yoda more about the source of funding for the army — a man called Tyranus , who happened to be Count Dooku , a former Jedi . At some point , she met with the Supreme Chancellor Palpatine , who wanted her research to extend his life indefinitely . She noted that he disturbed her . A year and a half into the war , Ko Sai defected to the Separatists and soon , clone commandos and ARC troopers were deployed to find the scientist before she could reveal any cloning information to the Confederacy . However , she quickly abandoned the Separatists as well and became independent , fleeing both the Separatists and the Republic to continue her work in secrecy . Kal Skirata , his Null - ARCs , Ordo , Mereel , along with Walon Vau also took up the search for the scientist in the hopes that Ko Sai would be able to engineer a full life span for the clone army . After a prolonged search , they found her on Dorumaa , hiding in an underground laboratory . Sai was unwilling to help them , believing that Skirata would sell her research for to the highest bidder . Ordo , seemingly in a fit of rage , destroyed her research in front of her , leaving the devastated Sai without a legacy . Unknown to her , Ordo and Mereel had made a backup copy of her research , in case Ko Sai never gave them the information they wanted . Without her , they could bring the research to other cloners , such as Arkanian Microtechnologies or the Khommite s . Ko Sai , however , was kept ignorant of this fact , in order to leave her broken and more willing to cooperate , hoping for an opportunity to start over with her beloved work . In exchange for blood samples and multipotent stem cells from Etain Tur - Mukan and Venku ' s umbilical cord , Ko Sai surrendered some of the gene sequences that would allow for the age reversal to take place . After studying Venku ' s genome , Ko Sai committed suicide by hanging herself from a rafter , leaving Etain a note thanking her for the opportunity to study such a fascinating genome . Mereel , along with Jaing and Ordo , prepared her for transport to Kamino , last seen moving her corpse into a barn with vibroblades drawn . Skirata later delivered Ko Sai ' s head to Delta Squad , who were to offer it as proof of her death to convince the Republic and Palpatine to give up searching for Sai and her research . Post - mortem . In 40 ABY , Goran Beviin told Boba Fett that someone killed Ko Sai , saying that most of her corpse was returned to Kamino in pieces , leading Boba to believe that her death was an act of revenge . Later it was discovered that part of her hide was made into a pair of fine gray gloves worn by Jaing Skirata , one of the Null - class ARCs . Personality and traits . Ko Sai , like most Kaminoans , was a very cold and calculating sentient due to Kaminoan culture . Kal Skirata told Etain a story about a Kaminoan child who was born with green eyes , whose mother had hidden it in one of the clone training areas . Kaminoan society permitted only gray , blue , or yellow eyes to determine caste , so Ko Sai had the child found and killed only because it possessed an undesirable trait . She referred to all of her clones as " units " . After two years of experimentation with the first batch of clones , the six Null ARCS , she ordered them to be terminated because they had a flaw ; they stubbornly questioned authority . They were saved by Kal Skirata and Jango Fett , ostensibly for use as special intelligence operatives . Skirata raised and trained them personally , but all six never fully recovered from the horrors of Ko Sai ' s experiments . Even when held in captivity by Skirata and the Nulls , she was still her old self ; in order to spite her clone captors , she committed suicide to deny them information .