Signature:

Name: Sebastion
Age: 25
Gender: Male
Contractor: none
Bio: He is a lover of music and a quiet type who tends to do his own thing. He works better alone but is also Damions bodyguard. He has the power to play any instrument and drive a person into insanity the longer they are forced to listen to him. He formed a contract with Nirav after manipulating him a bit, in order to have a weapon for him to kill those who were under his influences.

Likes: Musics and Instruments, do his own things. Tortures.
Dislikes: Having peoples not listen to his musics, those who break his instruments. Cell Phones.
Weapon: Multiple of Instruments.
Attacks: Insanity Song ( Violin ) - Drive a person into insanity the longer they are forced to listen to him.
Mirror Tune - ( Cello ) - Mirrored one's attack and sent it back at his foes.
Death Noise ( Guitar ) - Weaken his foes who listen to his musics, the longer they listens, the greater they become weaken.
Look:

Stats: 300
Attack: 75
Strength: 50
Speed: 50
Endurance: 50
Adaptability: 75

Spoiler (hover to show)

Name: Nirav Kikoeru
Age: 17
Gender: Male
Guardian Spirit/ Destruction Demon: Aku
Bio: Nirav is a mute and deaf boy who is also immune to sebastion's music effects. He desires powers and to tortures others, even to death. Because of this, he formed a contract with Sebastion to gains powers, unaware of the manipulation.

Likes: Musics, peoples going mad. Torture.
Dislikes: Silences. Annoying things. Interrupt his tortures.
Weapon: Ice weapons.
Attack: Kōri - Able to use Ice powers.
Arashi - Summon a mini ice storm.
Look:

Stats: 300
Attack: 75
Strength: 75
Speed: 75
Endurance: 30
Adaptability: 45