they gives you plt spirit for getting certain amount of killed orc (bottom event on right side) i also have gotten 2 from farming talisman (meet required amount)
if stats of her is what in last map then she has defence stat of Leanne lv55 and x2 on skill along with decent attack, imagine last map of daily revival of plt witch (not Belinda) she can take place of Leanne and save bunch of time