I got a few, this is fun to think about. I never thought about direct themes for each character, outside of basic symbolism, so it definitely helped me decide some things on my less developed ones!
Danica - Pursuit of dreams in the face of everything going wrong, but also knowing when those dreams are too much and may hurt others. As the leader of the group she has to put her ambitions aside, but never gives up on them
Adam - Redemption. He's a character with a bad past, both bad things done to him and by him, and in the current story he tries to do good by his friends to make up for his history
Nova - Acceptance of self. This character has no memories of her past, but there are hints that she was a bad person. Her character is about being optimistic and being the best she can now, regardless of her previous life.
Eilo - Bravery. This is my most skittish character (and most moral) with a lot of fears, but he overcomes them to help stand up for and to his friends.
Sterling - Trust, as in the acceptance of losing control and letting others make calls. This character is in control of everything, logical and never letting emotions decide. He keeps people at a distance because they are factors he can't control, but as the story progress he learns to 'go with the flow' more and enjoy the chaos that comes with life
Lyka - Freedom, this character was raised in a gilded cage, then as a fugitive with little choice in her life. Her character growth is choosing for herself and deciding her own path
Azarael (I saw another fellow angel of death on here lol) - Hope is this character's theme, they're always optimistic and putting their best forward, even when others don't want to. They go from childish 'everything is okay' to a stubborn 'we'll make everything okay'