Our plotline is based in three groups that are raising. Here is the description of them.
Order of the Phoenix
They are a group who defends the light and hates dark arts. They defend muggleborn's people rights and believe in the good things of the life. They battle Death Eaters, but they still are not aware of the development of the Rachilius and some of their most important deaths in the group are now due to them. They are a strong group, and they use an Unbreakable vow of secrecy once someone wants to be part of it. Every member of this group has a so pure heart that they'd die rather than betray the order, or they would die defending what they believe.
Death Eaters
This group is the greatest enemy of the OoTP. Dark arts and blood purity are their most noticeable defendings. They are convinced that muggleborn people are slag and think they should kill them all. They would never let anyone see them if at some point they hang out with a muggle person or a muggleborn wizard because they know they will be dead. They defend blood purity, but they are more coward. They'd only die if their Lord kills them. They will run away and scape in a difficult situation.
Rachilius
This is the last and newest magical group rising in England and maybe will worldwide. They are kind of a mixture of the Order and the Death Eaters, since they like flirting eith dark arts but they think, as the order, that every person who can cast a spell can be called a wizard. But their center is religion. They believe in religion and in God more than anything else, and their Leader is convinced that he has spoken to God and he has told him that they need to rise and get more power to control everything. They tend to scape and hide when there's a complicated situation, but they are in the battle's front row if it's time to fight with a member of the order. They don't mind killing if that makes them reach the highest position and power.