He both resents Hoshi for his place as Azucar's actual son, and gloats that he's closer to her than Hoshi is. But he's also very attracted to the other weaver - perhaps a little more than is good for him. He'll never tell though.
He feels a little threatened by how much trust Azucar puts in Eli, that the other weaver has successfully run the Willow House on his own for a while, and how beautiful and fawned over he is by clients. But he has no problem shelving that for a little roll in the hay every now and again.
Azucar took him in, sheltered him and pampered him, so in a way she's a mother figure he never had. But she's also an incredibly attractive woman and they sleep together occasionally when bored; safe to say Eli's feelings are complicated.
Douglas likes to 'run across' Pavel in his travels and take advantage of the larger stardragon. He's just so sweet and passive, it's hard for Douglas to resist breaking him just a little. Plus, they're both cannibals and that's kind of an exclusive club.
Baiyu loves teaching, and all her students are precious to her. Haru is a bit closer than some of the others due to their shared talents with earth magic however, and she enjoys having someone to pass along her skills and tricks to.
Not only a lovely master, but also a great teacher in whatever Baiyu decides to teach Haru. He holds his master very dearly, as his own family as Baiyu can teach him much more than he ever expected to learn.
Of course, sometimes Haru's young blood cause him skip training, but he's ever so greatful to be given the chance to learn from someone so experienced.
Baiyu loves her adopted child, and just wants to see them happy. Sometimes she gets frustrated with Orbei's reckless nature and impulsive decisions, but, what is parenthood other than worry and forgiveness?