Roles that I am assigning are:

The 9 Level 50 Espers, they are powerful human beings that uses kinetic abilities however only one ability like telekinesis, telepathy etc. They aren't rank on power but the application and usefulness of their abilities that contribute to the country's economy and science.

The Demon Worshipper Clan.
Fujiwara-Kai, one of the most powerful noble families in Japan and well known Yakuza. For short you call them the Fujiwara Clan, the clan is known for it's harmony because they are able to have many clans on their side hence it makes them the Fujiwara-Kai. Anyone can join and there's not a need to carry the surname because the clan consists of many clans. The clan's trademark power is fire whether it is Pyrokinesis an Esper ability or any form of magic but since there clans that are affiliated with them, it doesn't need to be fire, a clan with a thousand skills dubbed as the "Senju". 

Tsurara-Kai, the most menacing Yakuza Clan and the rival of the Fujiwara, this clan is the equal of the Fujiwara Clan. They are known for their prestigious, Yamato Nadeshiko and women, never seen before in life this clan produces the finest women. Back in the past this clan is all filled with women due to it's Yuki Onna heritage and today gender is equal. Ice is the power of this family, they are pure blooded and some are born with ice powers. Due to a certain incident this clan was massacred and it is unknown if there are anymore survivors. This clan is dubbed as the "Uchiha". *SPECIAL ROLE ACTIVATED*

The role is simple, you are the last Tsurara and your goal is to kill a band of thieves because of it's abduction of clan members and massacre. The requirements:
-Ice powers! But not too hax.
-You must be a female with black hair and red eyes.
-You have no eye powers, I was just making my explanation a whole lot easier.
-You are an Avenger.
-You are an Anti-Heroine, one of the main focuses in the RP.
-must be active.
-Take Kurapika and Sasuke for example, learn from them and I want your avenger to be unique.
-Must remain sane unless you turn insane.
-You are the foil to all the characters here by antagonizing them, you are neither an enemy nor an ally, you take sides depending on interest just to get to your goal.

NOTE: This has nothing to do with Naruto, I was just making a reference.

Hasegawa Clan.
Currently the most powerful clan in Japan, cousin and great ally of the Tsurara and they are known for their intense powers and authority. Formerly Yakuza but now alongside with the government. The clan is known for it's notorious eye powers and the product of Hyakki Hyakko, Night Parade of a Hundred Demons.

NOTE: These clans, their demon blood died out for many generations therefore having an actual Youkai/Demon is rare and a slim chance.