Lulu

A sword given physical form, the snow leopard and her icy blade are one and the same, even if physically separated. Her animal body was originally constructed from snow (though typically flesh and blood until otherwise), and it can be reconstructed as long as the sword itself is relatively intact. When fully-formed, her organic body is indistinguishable from a regular one, and has all the senses, needs, functions, feelings, etc. of a standard physical body, if a little colder to the touch than one might expect.

Though she was animated by the spirits of those slain using her, Lulu herself is a relatively cheerful person with a somewhat hopeful outlook on the world as a whole, saving any disdain she has for individuals and specific crimes. She loves playing in fallen snow, especially if she actually has someone to do it with and especially if there's a lot of it. Despite the hatred that formed her, she herself doesn't feel a lot of it.

This disposition, however, hides how strong she truly is. Able to control tons and tons of snow, cut through defenses like air, and strike at blistering speeds, she's a bogeyman on the battlefield, and only the skilled can face her and survive, especially in colder weather. The souls of those unjustly slain flock to her, and when enough come, they will often compell her to seek out those responsible and... deal with them (as long as they are close enough to her for her abilities to pick up those souls). Otherwise, she'll only take on people who do bad stuff in her immediate vicinity and won't seek fights that aren't hers. If someone were to hurt a friend, though....

Despite how happy she is on the surface, she takes great pains to try and contain the worst of her power when it's not needed.