Playing on phone might be like that because of size limitation, as playing it on computers give you face icons or location icons on screen of those who are there or where you can go. Might have to review what can be done about that later.
With Harold, was it the scene where you go inside of his house and he treats you as a trespasser? Or does he know your name? Cause there's a scene where if you haven't met him, he's doing what he does when you properly meet him. Or does he mention your name and you haven't done the event where you two properly met? The ? icons, aside from introducing a character you haven't seen, are also events that can happen during certain times if you meet the requirements.
No clue why you can't meet anyone at the cv area. There should be a few people that just appear there as long as you unlocked the phone. Not all as some of them require other things, so maybe check the mini guide and the time you're going at?
The ones that Kru give you, aside from the mpreg potion, are used during scenes that call for them currently.
Your options in battle relate to the race you currently are.