Ok I have a few demons of my own to share today. They are the Yokai.

The Yokai is a small group of rouge demons bent on undermining the Three head demons and spreading anarchy through the demon world (Unlike the Akatsuki world domination is not that appealing to them). Their members and positions are as follows.

Leader - Vengence
Second - Pain
Third - Iwa
Fourth - Toushii
Fifth - Oni
Sixth - Raiden

Their positions (excluding Vengence) Are not in correspondance to their level of strength.

Profiles:

Vengence

Name: Vengence
True Name: (Unknown)
Age: (Unknown)
Gender: Female
History, Personality and Goals: Vengence is the only demon that remained loyal to the previous head demon of fear, and even fought Ishimaru beside his master. But He lost and she fled to the human world to escape judgement. She spent many years there, gathering souls and gaining strength. She nursed a deep seated hatred for Ishimaru, ironicly wanting revenge for her master. She plans to sink the demon world into the chaos of anarchy to exact revenge on Ishimaru. SHe is a cold, calutlated person, and takes her time. She learns such patience from her stalking her human prey. She waits on those who seek revenge, and tears out their souls to devour once the act is done. She thinks on the consequences of her actions very carefully, so as the outcome is in her favor.
Element, and Methoods of Attack: She has no element, but she has spider-like attack methoods. She will lash out with her long bladed legs, or use and acid based silk to strangle or injure her victims. She can also sting them with a paralyzing toxin.

Pain

Name: Pain
True Name: Suffering
Age: 1,276
Gender: Male
History, Personality, and Goals: Pain is a strange demon. No one knows where he came from, where he was born or made, or if he was even made at all, but simply sprang to life of hs own accord. He met up with Vengence when she appeared in the human world. He stayed by her side and is fiercely loyal, never questioning a single thing that comes out of her mouth. He is emotionless, cold, and comletely devoted to his master's cause.
Element, and Methoods of Attack: He has acid for an element. He can spit it, ooze it, and control it at his will. It is how he lives to his name, Pain. He thrives by causing it.

Iwa

Name: Iwa
True Name: Diasuke No Matsunichiruu
Age: 3,658
Gender: Male
History, Personality, and Goals: Iwa is a demon of death. He used to be a human, but Death marked him. He was to kill Fayore when she was 'slain' by Orochimaru when he kiled her mother, but since Shishenobaru protected her, he failed. He was to await his fate in a prison but was sprung by an unknown benefactor. He escaped and fled to the human world. He wants to become the head demon of Death, and plans to betray Vengence once he is killed. He joined the Yokai to fofill this purpose.
Element, and Methoods of Attack: He has no element, and attacks by shooting large spikes from his fur. He also wraps hiw huge tail around his victims, squeezing them until they die or wrapping in two places and ripping them apart.

Toushii

Name: Toushii
True Name: (Unknown)
Age: 743
Gender: Male
History, Personality, and Goals: He was born a demon, and always had been one loose son of a gun. He loves to drink, smoke, and go wenching. He's loud, and swears so much he'd win a contest against Hidan. He tends to act first and think later. He agrees with Vengence, bu not on the revenge thing only to cause a little chaos. He joined the Yokai simply for an excuse to his roudy and extravagant behaviour.
Element, and Methoods of Attack: He attacks with his claws, hair and black beams. He has no element.

Oni

Name: Oni
True Name: Bijuunatsuki
Age: 56
Gender: Female
History, Personality, and Goals: She is the youngest of the Yokai, and the most out of control. FOr this she was banished to the human world to keep the already unstable peace. She follows Vengence simply because she is stronger. She likes to kill, to cause pain and misery whereever she goes. She joined the Yokai for that reason and because with complete anarchy, she can cause as much pain, miserey, and suffering as she pleases.
Element, and Methoods of Attack: She has the element of fire. She weilds it as a whip, strangleing her victims in a buring embrace until they beg for mercy or die screaming.

Raiden

Name: Raiden
True Name: Raiden no Tengu
Age: 4,743
Gender: Female
History, Personality, and Goals: Raiden was a demon of despair. During the last great demon war, she led a march against the armies of Death. Before the attack, a demon mage sent her to the human world and sealed her in a thunder-struck tree. She remained there, hoping Despair would help her, being the powerful general she was. But he never came and she grew resentful. Vengence came and freed her, and she joined the Yokai to exact her revenge on his betrayal.
Element, and Methoods of Attack: Her element is thunder. She emits a huge bolt from her beak and feathers at will. She also swoops down on her enemies and claws their eyes out.

Ok so that's them. I didn't include description because I'l upload picture soon.