Voted Poppo for a few reasons
.Was the character that had not been changed much since the friends depart (aside Meiko in a sense)
.Had always been concerned for his friends and would do what he can do do so.
Even though he had been under the "rule" of Jintan as a child, he had his own motives as well.
.Even though I do not like doing this, he could be the character that I "most relate to" in some ways.