Hue is a bit uneasy around Evening but at the same time finds slight comfort in their presence since he knows no one will mess with him, or potentially hurt him, while she is around.
Evie takes pride in her experiments, and one could even go as far as to say she cares for them in a way. Though it's more like the way an artist cares about their art projects verses actual affection. She protects them at all costs, even to the point of killing those that threaten or harm them. Hue, along with Five, is one of Evie's most prized experiments, as he's one of the only two living ones.