The game needs to have more information on how to unlock characters. For instance, once I finished Heramael's story, the game never indicated that I should go to the lab to meet Syxia and unlock her quest.
Once certain characters are unlockable, the game should add a quest to show how to unlock them.
And some hints should be more intuitive, ie. instead of using fake, useless, and confusing info like "gobbo" it should of say the goblin or Syxia (like how Isabel's hint says I need to progress with Neon, not calling her punny or some other useless word).
I don't mind the random scenes not having hints because they aren't in the events theater (like surprising Estia at the pool in school, or joining the girls while they bathe), but events that are in a girls event list should have hints associated with them.