[u][b]Concept of Energies[/b][/u]
Energy neither can be destroyed nor created, we are all entitled to have a power source and each of us have different types of reserves. These reserves determines our potential and efforts, it is foremost the most basic essential thus enabling us access to our powers and without it, we can't use our powers. The laws of energy are explained here.

All living things have Ki which also known as the energy of life, it is dormant to majority of all living things and very hard to activate. There are also energies called AIM for Espers, Mana for Magical terms, and Youki for Demons and many other forms of energy, the tree of life, Ygdrrassil is the source of all energy. We replenish energy by rejuvenating ourselves with food and drinks, daily basis but it has slower process, we sleep to regain energy, we train to get energy, we learn to use different types of reserves. We rest to get get it and we absorb ethernanos from our environment thus providing us energy.

[u][b]Factions[/b][/u]

Blutsauger Scarlet 
-An independent organization that are seemingly "do gooders", however, they are hunter assassins who secretly help keep the world "pure". They act on their own accord through assassinations and bounty works, no remorse to their targets, they kill them instantly, apparently they are a type of "government" who operates in the most twisted ways as possible, cruely knows no bounds. Blutsauger means Bloodsucker, the group is not only filled with Vampires but different types of demons and humans are welcome too, their job is to kill all unecessary beings like the infected, monsters, zombies and execute criminals on sight. The group consists of 12 different people, highly skilled assassins, their symbol is a dragon. The dragons are called scarlets or dragons, apparently their alternate group name is called the Scarlet Dragon or the Scarlet's Sin.