I’d do this through the metadata.
So you can add a field “friends” and then add the names of those in each persona note.
Example:
I want to show different relationships among them. I want to show that Jack and John are friends, while John and Jason are foes. Jason and Jack are friends.
Jack.md
---
friends: John, Jason
foes:
---
John.md
---
friends: Jack
foes: Json
---
Json.md
---
friends: Jack
foes: John
---
To then toggle things, it can get pretty tricky. I explained how you can edit metadata using a swap button that toggles between things, not like in this example though, would need some editing.