You're an angel. Not metaphorically, not in the "you're so sweet" way; you're a literal angel - ethereal energy form, wings, and all. But you're not just any sort of angel. You're a guardian angel. Guardian angels are a caste, or choir, created with the sole purpose of protecting those they're assigned to. Each angel is created specifically for the person they guard, with a few exceptions. The only thing you're programed to know is duty.
Naturally, being invested in your charge is expected. What if your feelings for them veer away from "dutiful" into "fondness" and then...something else? Angels aren't supposed to know love, at least not in the way those in the living realm do. Still, nothing is as certain as it used to be, and you're not so sure of your purpose. All you know is that you want to keep your charge safe.
Can you guarantee that, now?( prompts )