Frankly it sounds like you want some kind of perceived prestige in having an approved guide rather than actually wanting to make a useful resource.
Create a backstory and simulate a life for when they're not with you.
Instead of your tupper always being present, give them a backstory that fits in with reality, a real-life accommodation, job, friends, etc. Visualise them living that life. Whenever you want to speak to them, you have to call each other or physically meet up. If you're willing to experiment, that is.