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.
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.
Grimoire worked on the discovery of Chaos and Omega with Lucrecia Crescent, who was his assistant. It is said he found a Cetran tablet, which spoke of Omega and Chaos, and was the one to write the first Omega Reports. 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."
grimoire is a textbook of magic. Such books typically include instructions on how to create magical objects like talismans and amulets, how to perform magical spells, charms and divination and also how to summon or invoke supernatural entities such as angels, spirits, and demons.A
"Valentine" is a primarily masculine given name derived from the Roman family name Valentinus, which was derived from the Latin word valens, which means "strong and healthy".