I propose the following modification:
- Choosing a target to protect keeps the bodyguard away from home, thus they can't be targeted directly
- Other PR's (aside from killing roles) that target the bodyguard's target get the generic roleblocked message, making the bodyguard's protection of their target complete (and a double-edged sword!)
- Kills of course kill the bodyguard instead of the target.
This gives a bodyguard some much needed 'muscle', and makes it a viable PR for more than just a slot filler role.