Ellie-costume-07-legs.pak
The presence of "costume" in the file name strongly suggests a game with a heavy emphasis on cosmetics, character customization, or fighting game skins. In The Last of Us , costumes are often realistic and grounded; "Costume 07" implies a catalog of options, which is more characteristic of a fighting game, a gacha RPG, or an action title with unlockables. This points toward the character likely being the star of a modding scene, where players obsess over every visual detail.
While the exact visual result depends on which modding pack you downloaded (e.g., from NexusMods or GameBanana), universally serves one purpose: It replaces the lower-body geometry and textures of Costume Slot 07. ellie-costume-07-legs.pak