Who is the best Leader and why?

Well best i guess you mean for pure battle purposes ?

I like Morpun for the extra pill he gives.

Depends each Leader has there own special ability once they reach level five but u can only have one in a fight for it work. i like ashiguara... the best but check out the other ones 2

I like Hugo as he gives extra attack the fight winnig mainly depended on attack

Bridget is good she gives extra life

Yep in tough games is Bridget good, but if you have big killers in your pack you need stronger attack or more pills.

I like Perle. She's not a Leader but she's stronger and has a better ability then Bridget (I've said that before here).