Well,
I'll just say this.
Whoever that got Mami's roles last time would know that she has three abilities.
Also, whoever received Sayaka's role would have an ability to damage a target by 40 LP.
I don't know the rest since I never got their roles but I did become Sayaka in last time and Mami this time so I can tell you that.
Also,I just realized,
On the first day, we all voted for Calamity for her aggressive tactics and dies without her role revealed.
On the second day, Aker, with 5 HP left since almost all of us hates his guts, was making his last revelation, trying to contact Kaname Junko aka Madoka's mom.
On the third day, Yuiki finally revealed Calamity's role, which is Kaname Junko.
Irony much on how Aker was telling Calamity that she would die early if she plays the aggressive tactics just to realize that she is actually his only way to complete his personal goal!