Not all. Just put your mark on it- in some way, make it something that is your own. By knife or paint or anything else.

[ Even though it's a tiny knife he still keeps on an eye on it- he has no reason in the world to think she'd ever point it at him, but all the same...

He's also ready to grab her wrist if it looks like she's gonna hurt herself. ]

If you have something here already that is entirely yours, crafted by your hands, we can use that instead. But if it fails to protect this space it may break.