Kusul

A Kumiho: a fox spirit associated with trickery and misfortune, Kusul lacks a fox marble, resulting in them not having any actual transformation powers.
Kusul's a bit of a whimsical free spirit who does whatever they want. Calm and collected, they are rarely ever ruffled or show much change in emotion.

Even if they can't transform, they still often manually don disguises. Kusul lives off of free samples, often hitting the same place multiple times a day wearing different disguises in order to milk as much as they can. A bit of a freeloader and a swindler, they use their disguises to receive free goods and services their confidence leads people to assume they're someone important.
They're not really aware of how manipulative or cunning they are, they're just doing what they feel they need to to get by and achieve their goals. They don't consider their self a thief because "it was just given to them"; they won't deny that they're a bit of a fraud, though.

Kusul's goal is to obtain 1000 hearts from other mechs to insert into H.G.H.W. to reawaken it. They have a strong bond to it after it protected them before in the past, and Kusul views it as a dear friend. They employ different methods depending on the target. Sometimes they sneak in with a disguise and have it handed to them. Sometimes they brute force it, grabbing the heart with their bare hands, often leading to bloody hands or electric shock. Their hands heal fairly quickly, though they are scarred at the palms.

Kusul currently resides in H.G.H.W. i as a base hidden in a valley. H.G.H.W. has a fearsome tiger motif going across it's body; it is based off of the Chinese idiom where a fox uses a tiger's intimidating aura in order to assert dominance over prey. ITt is currently nonfunctional as a mech and only serves as a living space.