Yuki Onna:
A beautiful woman with long black hair and skin as smooth and white as marble. One of the deadly humanoid demons in Date A Demon. She carries a long silver katana that is shrouded by the power of winter. Everytime she appears, a heavy snow storm always occurred and her melodic humming will echo all around the area that she emerged. Legend say, if one person fall in love with her, her icy kiss will instantly freeze the soul of the victim and killing him instantly.
Gashadokuro:
A gigantic skeleton that appeared in the city. You can hear its teeth chatter and bones rattle under its massive weight. It can destroy giant buildings with ease using its humongous skeletal hands. If it catches a human being, it will crush the victim in his hand like some toy or it will eat them whole, but sometimes it only wanted human heads for its feast.
Oni:
An ogre or orc like creatures with multiple horns, wild hair, sharp claws, and fang like tusk. Sometimes they carry around a large club with them, making it their main weapon. These creatures appeared alongside the Gashadokuro in the city, eating and mauling anything that are moving. Oni are mostly known for its aggressiveness and their thirst for blood shed. They sometimes resort to cannibalism if there are no human flesh to consume. By their actions, they show their true evil nature.
Samurai:
They stand 7 to 8 feet tall, and carrying two weapons. One long katana and the other is a short sword use for punishing themselves to make them go berserk. Their armor are made from black iron that is tied together and a gauntlet that acts like a shield, all are enchanted by demonic powers. They wore a helmet with a crescent horn and a mask that resembles an Oni's face. Tohka, Origami, Kaguya, and Yuzuru encountered five of this creatures in Raizen high school.
The General:
They have the same appearance like the samurai, but the general stand behind the frontline. He is the one commanding the samurais to do their deeds. And if their warriors have fallen in battle, the general will cast demonic power and absorb all the fallen samurai inside their body to mutate into a six handed, four faced humanoid creature.
Ashura:
A fearsome demon with multiple faces and arms. They are the mutation caused by the general absorbing their fallen warriors. Each hands have different kinds of weapons: katana, Saber sword, a bow, and etc. Each faces resembles an Oni but each faces except the front are enraged. However, no one knows for sure what these things are capable of.
Leviathan:
The king of hell called it Evil God Beast. This is one of the largest demon in hell who made the sky as its territory. It had whale like body, however its appearance is similar to the mosasaur from prehistoric time. It had six eyes and can withstand heavy attacks, the way to kill it if you go inside it and face it dangerous vital organs.
Dante:
The younger son of Eva and Sparda. People also called him the Legendary Devil Hunter. He is Vergil's younger brother and Nero's uncle. He wields the rebellion who have now upgraded to Dante's Devil Sword after absorbing the rebellion and the sword of Sparda. He has white hair and he wore a stylish red coat. He also wears an ordinary black Henley T-shirt with three buttons as the sleeves itself reach through his elbows, where it also features torn details, for his wrists he wears black driving gloves and white bandages. For his legs, he wears a black belt with golden accents, black leather pants, and brown boots. His hair and beard also grew after being in a coma for a month. His most powerful weapon is the Sin Devil Trigger where he transformed into this powerful Devil that can summon a black hole.
Vergil:
The older son of Eva and Sparda, the elder brother of Dante, and the father of Nero. He is also known as the Alpha and Omega. Vergil and Dante went their separate ways, with Vergil rejecting his humanity and embracing his demonic heritage, in contrast with his younger brother's embrace of humanity and initial rejection of the demonic. Stoic and reserved, Vergil displays a willingness to do anything in his quest to obtain the power of his father, Sparda. Suffering defeat in confrontation with Mundus, he is tortured and transformed into this dark knight know as Nelo Angelo. However after so many years he returned and finally redeemed itself. He also learned that humanity is the greatest power of all. He wields one of the most powerful sword of his father, the Yamato. A katana capable of slicing through space and time. He has the same hair color like his brother, however his hair style is swept back which puts emphasis on the fierce, yet stoic expression on his face; however, when his hair is brushed down or becomes wet, his appearance is physically indistinguishable from his younger twin brother, Dante. Just like his brother, he also has the same, blue eyes. His coat is black with light neon blue serpentine patterns and three separated coattails with slightly tattered edges.  He also wears charcoal gray fingerless gloves, black pants and dark boots covered by teal gaiters. Same as his brother, his most powerful arsenal is the Sin Devil Trigger capable of slashing and bringing destruction.