Ryuichi Asakura
Ryuichi is Yohko's object of love in episode 5.  It seems
that he just recently  transferred to Yohko's school, and
the two run into each other  by accident.  Athletic, smart,
 and "better than average looking", he's exactly Yohko's
type. Unfortunately Tokima decides to  take  advantage 
of this and possess Ryuichi, in order to get closer to the
where his power is sealed within the  Mano household.

Tokima is  the most  powerful of demons, and  was the first  demon to bridge  the gap 
between the demon plane and the human realm. It was said that the world was nearly 
about to become another hell when the first devil hunter stopped Tokima, and  sealed 
up  a  portion  of  his power.  Although  temporarily  vanquished, Tokima  manages  to 
resurrect his remaining power and return to the human world, and  thus far each devil 
hunter   has   managed  to   defeat  Tokima  and  seal  up  another  part  of  his  power; 
sometimes,   at  the cost  of  their  lives.  Even  though  most  of  his  power  is  sealed,
 Tokima  is  NOT  to  be  underestimated.  Not  only is he extremely powerful, he is also 
extremely  cunning  which  makes  him just  as  dangerous  even  without  his  powers. 
While  Tokima  has been  fighting with  the  devil hunters for generations, it seems that 
he  has  only  one  avenue  left  to  try  and take over the  world and take his revenge on
 his  arch  enemies: the  devil hunters of the Mano family; and the last chance happens 
to be numbered 108.