Frankenstein "Noblesse"

"A twisted Personnality but so funny"

Frankenstein (Kor. 프랑켄슈타인) is one of the main protagonists of the series. He is Rai's devoted servant and has loyally served him for over 800 years. He is a genius scientist, whose abandoned research notes helped to bring the Union's scientific knowledge and technology to the advanced level it has reached in the series. Frankenstein is also the founder and current principal of Ye Ran High School, where he is known to all as Principal Lee. He is now the latest addition to the RK-5 bearing the title of Number 0.
Personnality : Frankenstein is a very cheerful and loyal person, especially toward his master, but can become quite serious and calculative when the situation calls for it. Although Frankenstein has shown a sadistic side during his recurrent battles, like Rai, he is also compassionate towards human beings, especially towards the students in his school. Before he met Rai and the other Gajus, he shows enmity and hostility toward the Nobles while displaying compassion and empathy for the humans who were getting attacked by mutants contracted to the Nobles.
He is seen on multiple occasions to be extremely organized and thus, he loathes messiness (especially in his house) almost to the point of obsession. However, it's unclear whether the obsession with cleanliness is due to a personal preference of being neat, or because his devotion to Rai is so strong that even a single crumb or speck of dirt in Rai's presence is unbearable to him.

He has been noted to be reckless, exceedingly dangerous, and bloodthirsty when he uses too much of his power, to the extent that he even got yelled at by M-21 for using a weapon he cannot control.

He has the ingrained nature of a scientist with a passion for experimentation. In the past, he used to do a lot of research work, which sometimes caused Rai's displeasure. Frankenstein's ways made Rai order him to seal his powers before Rai went to sleep. Now Frankenstein does his experiments with the consent of his subjects, although he sometimes indirectly forces them to. In contrast to the Union, Frankenstein treats his subjects well and considers them under his protection. The change in his ways has caused Rai to remove the seal on his powers. However, he is only supposed to use his full powers when given permission by Rai, as he was very upset in his battle with Takeo that he was disobeying a direct order from his master when he decided to use his full power. Rai usually withholds permission unless the opponent is extremely strong and the seal would handicap Frankenstein to the point where he might be harmed, like with the 12th Elder. He also takes extreme pride in his work such that after hearing of the incident with Na Yonsu, he tells M-21 and the others in Chapter 215 that losing, even intentionally, would offend him as he is the one looking after their bodies. This is enough to get them sweating, especially as Frankenstein started giving off a dark aura while saying this.

Now, Frankenstein fights not only for his master but also for everyone who is under his protection. Also, Frankenstein shows concern for his master when Rai uses too much power or removes the seal that restrains the immense power of his "Soul Weapon." This worry is due to the opinion previously stated by Frankenstein that Rai's body hasn't recovered even after such an extensive hibernation.