With the girls, as Wilfred said (in the latest update), each of the girls have a problem which Cordia wants MC to solve (Gracie: human interaction/socialization, Luna: barrier due to trauma, Isabel: boredom)
But even with this being the case, how much would Cordia be tolerant with MC getting in deeper with the girls in their relationship is still a big question mark (and only Hopes can answer that, though I think we'll just find out through Cordia's story).
I might be completely off the mark with the following, but I have a feeling that Hopes will build up Cordia's events which leads to her "reconciliation" event with Luna. Some thing a bit like fix Isabel-Gracie relationship event, but pulls at our heartstrings like "My name is Luna" event.
Getting though that event I think may be the first milestone for Cordia (in possibly "love" stage), and perhaps second milestone for Luna (after her My name is Luna event).
But who knows.
Regardless, I'm looking forward to her storyline.