Susan: During the Golden Age, and up until Susan decided Narnia didn't exist, Susan would do Lucy's hair every morning. It was their main sister time, where they could talk and Lucy could try to make her sister laugh. Susan would be the one to point out when a suiter was interested in Lucy, although Lucy never seemed to have those feelings, at least not yet.

After: Susan drifting away hurt Lucy in a way it didn't their brothers if you asked Lucy. And, because Lucy second guesses herself, on occasion Susan saying things like 'isn't it funny what we used to pretend' causes Lucy to wonder if she had imagined it, even while knowing she didn't.

Yes, occasionally Luce feels jealousy about how easily Susan moves in the human world and how beautiful she is.

Peter: Lucy is the baby of the family. Even before Narnia, Peter treats her carefully, as though she's breakable. This doesn't change after the Battle at Beruna. Lucy has her cordial and can heal anyone with a drop of it. She may not have been in the fray, but she witnessed the aftermath. She ran around trying to save as many wounded as possible and still has nightmares about it.

But Peter? Peter won't even allow her to go with the healers when she's young, even though she could do good. Sometimes he's too indulgent with his little sister, who is obviously his favoured sibling. He seems to forget that his sister didn't see the effects of the battle.

Ed: Lucy forgives Ed a whole lot easier than Ed forgives himself after his involvement with the White Witch. But, in some ways, she can be more honest with him than their elder siblings, because their closeness in age means Ed views her more as an equal than the baby of the family. She's the one who will try to help cheer up Ed and...eventually explains to him what happens at the Stone Table during a walk where they're engaged in honesty.

Lucy, (after much much much convincing of Peter) when she's finally in her teenage years, is allowed to train with the healers in Narnia. Yes, she possessed her cordial, but Lucy wants to learn the ways of her subjects, including what different species require for various ailments. (After all setting a faun's leg will differ from a broken wing.) She is not as gifted as some, but she makes up for it with dedication and study.

After Peter begins his studies as a doctor, Lucy begins to toy with the idea of becoming a nurse. She wants to help people and, as a female, it's much easier for her to join the nursing ranks. And, after all, she adores her eldest brother.

Lucy is, in some ways, the most accepting that they return to the age they were when they entered Narnia. If no time passed, it makes sense she's back to being eight year old. After all, what would people say if she'd left at the age of 8, no time passed, and she returned at 22 Plus, quite honestly, it means she can have morea dventures without worrying about marriage. This doesn't mean she doesn't wish to look the age she feels at all, because her lived experience, like her siblings, is much older than the ages they appear. But, she's the most upset about losing access to Narnia and is forever looking for ways to return between the Golden Age and meeting Caspian. Heck, one time at a friend's she suggested Hide & Seek just to see if her friend's wardrobe would send her back (although she would feel terrible if she managed it without her siblings) Even if she returns as the age she is, she wants to go back.