I like to think of a Lamb that, in the end, isn't vengeful.
All they want is a family.
Sure, they're a little idiotic (why do you want to eat poop, dear?) and can be intolerable at times (stop dissenting, I literally just wouldn't feed you poop) and they die too easily. And sure, they're the last sheep.
But they just don't want to hate anymore. They choose happiness because they feel better about it. They do feel regret and frustration and anger and loss. But deep-seated hatred is absent.
Perhaps Narinder calls them immature for maintaining these emotions as a god, but they're fine with it. Because of those emotions, they can choose to love with all their heart.
That's where I'm going with Lucy, tbh, but she's a little...
Well, she doesn't feel vengeful, but she does want to protect the new flock she's building. And to do that, she pursues power to an almost manic degree. And she lovebombs and coerces and drives herself to do heinous acts to anyone who betrays the trust she put in them, even if she doesn't want them to leave. Even if she clings to them. Feels the need to fix them.
She's a lil messed up, but she's got heart. She's also got more than one crown, so that's, er, a situation.