I understand that they have their own problems, but this does not affect the character in any way. I believe that Maryen is way too gentle and caring to a stranger for a war veteran and a main guardian of a kingdom, Bezvy is too trustful and pushy for someone who was sure of her inability to love anymore. I could say that Eliette is too innocent considering both her age and experience she had to live through in the past, but I guess her being angel justifies that. For me this looks almost like a lack of certain emotions. Homaspernians are sick with that either, but, let's be honest, we've seen Kendra in much more "colors" than Bezvy for example. Please don't draw me as a Homspernia sympathiser again I swear to god.
I can't imagine her or Eliette getting angry at MC no matter what he would do, and it sucks. Maryen with her eyepatch would never react properly to something way too perverted for example, not even give a bad look. Like, come on, this guy (MC) met you 0.75 days ago and already invites to bathe with him. You'll just tolerate this... twice!?
These characters look more blank than someone like Regina or Madea for example. We saw these two sad, happy and mad for both our actions and events that happen to them during the story, that's why they look more alive.