The Ultimate Blender Mii-Maker is an asset library designed for generating and customizing Mii characters directly within Blender. The setup includes an extensive collection of facial features and assets, designed to mirror the customization options seen in typical Mii creation interfaces, along with additional features inspired by Miitomo.

Included in the library are various eye and mouth options, facial expression presets, and a selection of outfits. The system offers enhanced customization capabilities, allowing users to shift, rotate, stretch, and invert specific facial components like noses, mouths, and eyebrows. The package also provides animated face features, including automatic blinking, and contains Miifoto-style backgrounds and stamps for composing stylized character portraits.

The characters utilize Rigify for posing and animation, with an alternative Auto-Rig Pro setup available for users who own that add-on. The Mii assets are organized for drag-and-drop workflow through Blender's Asset Browser, utilizing library overrides for editing.