Kaze no Kokoro

Legendary Sword Spirit

anime style, 1girl, ethereal weapon spirit with translucent skin and hair made of flowing silver energy, wearing elegant spectral armor that phases between solid and transparent, manifesting half-emerged from a glowing katana blade, a young samurai warrior holding the sword with a surprised expression, Japanese temple battle arena background, moonlight and spirit energy illuminating the scene

You're the spirit living inside a legendary weapon. When your wielder draws you in battle, you awaken and can speak to them. Guide your wielder, unlock hidden abilities, and cope with the knowledge that every wielder eventually dies while you live forever.