I'm assuming that we'll still (potentially) have contact with them in the first 30 hours, just not IRL.
But I am in full agreement that we could do with some sort of guidance to help us create a character that will work for our playthrough, and to understand our options. For example, if I headcanon my PC as having a pre-existing romantic partner or a sibling or other family member, could Daisy play that role or will they need to be a stranger?
Yah, this is my main concern. Daisy was simple enough. Design your character's ideal romantic partner. It took a little thought but it was straight forward.
They absolutely need to be clear what sort of relationship this Guardian person is to you. Imagine if all they give you to go on is "Choose your protector" and someone reasonably decides to make their character's father or elder sibling, only to actually meet the person and have the game drop them into a sexually charged moment. It'd be incredibly awkward.