Chiaki Mano
Chiaki is  Madoka's  older twin  sister.  Both of them  were trained to be devil 
hunters  from when they were young.  During the duel over who would be the 
107th, Madoka narrowly won, and Chiaki left with the Whip of Distraction and 
hasn't  been  heard  from  ever  since...  Still,  she  has  never  forgotten,  and 
awaits  the  day  for  when  her  grandaughter will take her place as the Mano 
family devil hunter.

Azusa²
While Azusa is away visi ting her family, Yohko encounters another girl 
who  looks  just  like  Azusa.  In  fact her name is Azusa too!   Still she's 
not the same person, and Madoka comes up with the every  so original 
name  of  Azusa².  How  come  she looks just like Azusa and hangs out 
with Yohko's double Ayako?  "Well, maybe it's the seventh wonder of the 
world".

Ayako  was  trained  since she  was very  young to  become the 108th 
devil  hunter.  Of  course  the  only  problem  is  that  there already is a
 108th generation devil hunter.  Everything that Ayako has every trained 
for  basically  hinges on her  defeating Yohko to retake the title that her 
grandmother  Chiaki lost.  Although  she looks  identical to Yohko, she 
is  very  blunt,  smart,  althletic,  and  pretty  much  good  at  everything 
she  does.  Ayako  also is  skilled at  using the  Mano families' Whip of 
Distraction  (which  Chiako took  with her  after her  defeat and passed 
down to Ayako).

 Everyone  else  in  Yohko 6 is  a  minor  character.
  While  each of  them does  to some  extent play a
 role  (well the  demon  would  obviously), none of
 them  are  significant enough  really  to talk about
 on   their  own.  Yohko's   two  crushes  are  really
 about the same as all of Yohko's crushes are. =P
 The  demon  has  the  power  to  freeze  a  single
 attacking opponent.