So there are fast transportation but its suicide to use and Kanami is going back to japan to solve the mystery and level up. What group/guild is Kanami currently leading? Is she along when she travel to japan? that's what... suicidal?
What is the latest level Shiroe and the others? There is a boss that is level 95 in vol 4. Ruseato of seven prison. If they stay at level 90. The gap of 5 levels will be hard specially in boss battle.
The undine are sexy
