Grimoire Valentine Grimoire Valentine is a scientist and the late father of Vincent Valentine who was introduced in " Dirge of Cerberus - Final Fantasy VII - " . Profile . Appearance . In a manner similar to his son , Vincent , Grimoire had an incredibly tall , imposing figure . He had pale skin , which served to accent his jet - black hair and crimson eyes , the latter of which was noted by Lucrecia Crescent to be exactly like his son ' s . Overall , Grimoire bore a striking resemblance to Vincent . Grimoire ' s common attire consisted of dark grey clothing , which was segmented in numerous joint sections by black leather straps with silver clips . Draped over his shoulders was a magnificent black leather overcoat . Grimoire ' s red ascot was specifically designed to be reminiscent of his son ' s red bandanna as well as add a bit of flair to his otherwise drab appearance . Personality . In Lucrecia Crescent ' s flashbacks , Grimoire was shown to have a calm demeanor - yet another trait he passed on to his son . He was also quite fond of Lucrecia , as seen when he protected her in a lab accident ; the selfless act cost him his life . In his final moments , Grimoire was shown to have a spiritual side to him , as he calmly accepted the fact that his body would be reabsorbed into the Lifestream upon the event of his death . He also apparently cared deeply for his son , and he gently ordered Lucrecia to pass on his last wishes to Vincent . Story . Grimoire worked on the discovery of Chaos and Omega with Lucrecia Crescent , who was his assistant . It is said he found a Cetra n tablet , which spoke of Omega and Chaos , and was the one to write the first Omega Report s . He located the place where Chaos was destined to be born , Lucrecia ' s Cave , alongside Lucrecia . Grimoire was killed when an experiment during his research went wrong and he shielded Lucrecia from the blast . The Omega Reports , written by Grimoire and Lucrecia , make evident how long their research of Chaos and Omega was . The reports show the hypothesis Dr . Valentine and his colleagues made during the research , and states Grimoire was the one to discover the spring where Omega was to be born . Report number 6 , written by Lucrecia , says " The doctor believes the crystalline spring contains contaminated deposits of bioplasma that have overflown from the pure Lifestream " . The Omega reports mention the Protomateria , the materia found in the Crystal Cavern , a materia of one - of - a - kind , created by the dark Lifestream . Having been part of the events that lead to Grimoire ' s death made Lucrecia feel guilty , and she distanced herself from Vincent . During the discovery of Chaos and Omega , Grimoire and his team stumbled upon a stagnation of Lifestream onsite . Scientists took this information and took the stagnation and put it into children about to be born , but did not know how it was going to turn out ; even though they did hundreds of experiments , there was only one experiment that was successful — Nero the Sable . Not much is known of the relationship Grimoire had with his son , Vincent , but Grimoire ' s last words to Lucrecia were , " Tell my son I ' m sorry . "