A free mod for Mount & Blade II: Bannerlord, by Dromundas.

This is a tool for editing the game’s XML files in-game to change how characters are displayed and handled. It allows you to make changes to any of the game’s characters and save them as an editable file that you can later apply to your game.

You can edit the game’s XML files by opening them with the tool and editing them as you would any text file. You can add or remove sections of the XML document, change the order of elements, remove elements, add or remove attributes, and change the value of attributes.

To save your edits, you need to choose a folder to save them to.  You can also export your edits to a new XML document to apply them to your game. This tool is intended for use in the game, not for general-purpose XML editing.