I've based this concept off Tia from Brave Frontier. She's a pure healer and a very powerful buffer. This concept is mostly heals and buffs, so it might be overpowering or underpowering (depends on how you look at it). Well, it's Tia's time!
Forest Guardian Tia
A girl who grew up in the forest, isolated from human contact. Having been raised in the forest, she shared the same heart with her animal friends, who continued to protect her always. One day while walking through the forest, she met a young girl who was as lovely as a flower, and opened up her heart to her. As the night drew closer, the young girl revealed that she was a goddess, promising to take care of Tia's friends from now on as well.
Divine Guardian Tia
A girl who protected the forest with her animal friends. The forest in which she lived in was being gradually destroyed by the development of a nearby metropolis. Abhorred at the barbarisms being committed by humans against the forest, she watched as they tried to exterminate the forest animals with magical fire techniques. This fire would serve as the trigger that would unlock Tia's rage. Aching for retribution, a goddess bathed in blood appeared before her. It is said that the goddess invited her to destroy the humans together while smiling innocently.
Guardian Goddess Tia
A girl who led the forest animals to fight alongside the God Army. As the enraged animals began attacking village after village, they ran into one of the Six Heroes, Vargas. Using his fire powers to keep the animals at bay, a furious Tia appeared before him. Although Vargas wanted to reason with her, the girl under divine protection delivered a serious blow against him. This made the hero finally realize that she really meant to fight him.