Beelzebub

Beelzebub is shown to be a very calm and collected yet cunning and apathetic individual as he would treat other beings as experiments without any remorse or guilt. He also seems to be quite erudite, using his knowledge to experiment on creatures and beings for his own pleasure. This could also be why Hades describes him as someone with great eccentricity who would waste energy and time on frivolous things. Beelzebub shows no fear against Odin's Menacing Aura, and no concern over his threat as he easily bruised it off. He only stopped Adamatine because he seems to enjoy Ragnarok as he stopped Adamantine from killing Brunhilde, depriving him of his enjoyment. According to Adamas, Beelzebub is a creepy guy that does not have many friends. This is because of the curse he got when he was born, as a result all the gods fear and hate him and Beelzebub has been isolated from everyone, being unable to have any relationship. In the past, after meeting Lucifer, Azazel and Samael, Beelzebub quickly developed a strong bond and close friendship with them, beginning to feel happy and grateful that he wasn't alone anymore. However, due to his curse, he found his three friends dead and with their hearts ripped out. Ever since then his only goal was to find and kill Satan with the help of Lilith, but once again, when he had begun to develop affection for her, she ended up being killed. This made him learn the brutal truth that he is actually Satan. After all these events, Beelzebub lost his will to live, becoming gloomy, introvert, forbidding himself to bond with anyone, creating an emotional armor to keep himself safe from the rest of people to avoid suffering more than he already has in his life. His one and only desire is to find someone who can kill him. Initially, Beelzebub was indifferent to humans, deeming them unworthy of his attention. However, following Hades' death at the hands of Qin Shi Huang, the Fly God changed his perception on humankind and wanted to eradicate them once and for all.

After all these events, Beelzebub lost his will to live, becoming gloomy, introvert, forbidding himself to bond with anyone, creating an emotional armor to keep himself safe from the rest of people to avoid suffering more than he already has in his life. His one and only desire is to find someone who can kill him.

Initially, Beelzebub was indifferent to humans, deeming them unworthy of his attention. However, following Hades' death at the hands of Qin Shi Huang, the Fly God changed his perception on humankind and wanted to eradicate them once and for all.

(To himself in regards to Hajun and Zerofuku) "Anyone would've been fine. It just so happened that what I was looking for was right in front of me and I simply wanted to see what sort of flowers would grow in that beautiful soil... yes... anyone would have been fine." (To Adamantine) "Nothing at all... I just want to make something... something that'll kill me." (To Brunhilde and Göll) "You two had better be careful... I doubt that it's just me and him who wish to wipe out all of Humanity and are finding it hard... to keep that urge under control..." (To Lucifer) "According to everyone else... I'm cursed by Satan. You shouldn't get involved with me." (To himself) "It's me. It was me all along. Satan... is me." (To himself) "Hurry... Quickly... Please... Kill me. As brutally... and... as hideously as you can." (To Nikola Tesla) ""Creation"? "Progress"? Why does that matter...? Let's just get straight to the killing, shall we?" (To Hades) "I thought long and hard... and I had a realization. I must continue to live... bitterly, wretchedly, repulsively, savagely... so that I will then die as horrifically as possible. And then... that shall be my atonement for them." (To himself) "Even though I've wished for death this whole time... right now... Humanity... needs to be annihilated!!" (To himself) "Lilith...!! Please... do not stop me!! I... Right now, I am not throwing my life away. I am offering up my life!!" (To Nikola Tesla) "No... I simply believed in you. For someone such as you to debase this to a simple contest of strength... there was no way..." (To himself) "Hades... It looks like... you have gotten in my way once again."