Hello, and meet Acid Ecco. Older sister to Jackle Ecco.
Whereas Jackle is more of the calmer but careful type, Acid, as one could easily tell, is actively searching for trouble.
In their home forest. Deathoak. Where everything is poisonous, and the folk of the forest, like Acid, are immune.
The forest where everything dies before it can even get CLOSE to the home of the forest folk. And she's looking for trouble.

Jackle doesn't agree with the ethics of his sister. If she'd just stay behind and try and help the town alchemists like everyone else.
But Acid is very protective of their little brother, and will beat the living shit out of anyone who tries to touch them.