I suspect many of us agree that the greatest magic of JKR’s characters is not at all the amazing things they can do as wizards and witches. All of their displayed magical powers - from flying as a bird over an asphalt playground or forcing the petals of a flower to pulse like a heart, to their more “channelled” way of performing powerful charms that transform their surroundings or mixing up complicated potions that “ensnare the senses” – all of them are truly inspiring and open up your mind to an infinity of possibilities. But to me, the most magically beautiful thing about these characters, is rather that they are so real, so very much alive, that they seem capable of walking right out of the pages and into our own heads to stay there. We could as well have known them personally... And, to quote Albus Dumbledore:
“Of course it’s happening inside your head Harry, but why on earth should that mean that it is not real?” 
***
Lily Evans Potter is one of the characters who don’t have much “stage time” throughout the series, but she is definitely one of those who have left the most lasting imprint on my mind. To Harry, she continued to be merely a faint symbol of motherly love and sacrifice for most of his childhood – his only personal memories of her were ironically coming to life with “help” from the eerie Dementors, who made him hear Lily screaming in despair and pleading with Voldemort not to kill her son, but to take her instead.
This symbolic meaning of Lily is, I believe, best emphasized in the last book, when Harry visits his place of birth, Godric’s Hollow, and sees a statue of Lily, James and Harry’s own baby self on the central square of the little village (DH, Ch 16 Godric's Hollow):
Instead of an obelisk covered in names, there was a statue of three people: a man with untidy hair and glasses, a woman with long hair and a kind, pretty face, and a baby boy sitting in his mother’s arms. Snow lay upon all their heads, like fluffy white caps.
The statue of the “holy family” is, I think, somewhat mirrored by the golden Statue of Magical Brethren at the Ministry of Magic (OotP), where the wizard and witch seem admired and worshipped by other magical creatures who are depicted in “inferior” poses. The statue of Lily and her little family is literally placing her on a pedestal – an image which has already been reinforced to Harry by almost anyone alive who has mentioned Lily to him, with the sole exception of his aunt Petunia.
It’s definitely worth mentioning, of course, that the distorted view of the Magical Brethren is symbolically destroyed at the end of the fifth book, when the whole statue is blown to pieces by the duel between Voldemort and Dumbledore and thus by the reality of war. The statue of Lily and her loved ones, however, remains intact, magically concealed by a Muggle war memorial…
Lily’s stepping into Harry’s life as a more realistic person does not seem to begin until the moment he manages to get access to a real, objective, memory of her registered by another character. In Snape’s Worst Memory (OotP) Harry is for the first time able to see what Lily actually says and does and how other people respond to her actions and words. The sense that she has truly been alive strikes Harry with heavy force when he eventually finds a letter from her at Grimmauld Place, where she is talking about her everyday life and feelings in a handwriting Harry recognizes as similar to his own.
In this letter, which is addressed to Sirius Black, I get the impression that Lily shows a degree of innocence boarding to naivety, considering the fact that by this time she is participating in a full raging war, working for the Order of the Phoenix, and her family is hiding from a ruthless murderer. Nevertheless, she gives out a lot of un-coded information in a letter and she shows complete faith in all her husband’s friends, in spite of having probably heard warnings about a possible traitor close to the family.
But it’s not until Harry’s final Pensieve dive into Severus Snape’s memories at the end of the series, that Lily becomes fully “fleshed out” as a character, when Harry sees her growing up and is able to put together all the remaining fragments of her former existence into the image of a real person.
When I first read the Pensieve sequences about the budding friendship between Lily and Severus, and how it eventually ended, I felt both deeply touched by what she represented to Severus and angrily upset by how she treated him. The image of Saint Lily finally trailed away and was replaced by a more realistic picture of a pair of troubled kids who weren’t able to solve the problems appearing in their relationship, as the cruelty of the outside world was closing in on them.
***
My take on Lily Evans Potter is that she was basically a very kind and compassionate person, but I also perceive her as quite a bit vain and perhaps spoiled by people’s attention to her. She seems to have been, at the same time, both intelligent and skilful, as well as naïve and confused by her own feelings. She was, in my view, a bit too used to getting things her way to be able to grasp other people’s points of view and actually learn from reality – a most common phenomenon in those people who are raised in the center of attention and popularity. And it’s perhaps this mix of a loveable person capable of caring for others, and the self-centeredness of a young child, that makes Lily so much more like a person from real life.
I think Petunia’s jealousy is a good example. It seems clear that Lily, who is a girl with both good looks and extraordinary talents, doesn’t
want to realize the most probable reason for her sister’s rejection. Lily doesn’t want to see what it means to her older sister that Lily’s special gifts not only makes her awesome among both their family and other kids, but also guarantees her access to a whole world which Petunia can never reach. At the playground Lily is hardly trying to restrain her overshadowing of her sister, but instead she wants to impress Petunia further by displaying her magical abilities. At Kings Cross station she even tells Petunia that
she, Lily (who obviously is just an eleven year old kid), will attempt to persuade the Headmaster of Hogwarts to accept her older sister as a student…

When Petunia starts to insult her in her jealousy, Lily retorts that she and her friend have been reading Petunia's letters and know all about her own pleads to Dumbledore...
Later on, Lily seems unable to understand why
she can’t make her best friend Severus abandon his only male friends based mainly on what she criticizes them for. She seems, however, to turn a rather blind eye to similar bad traits in her fellow male Gryffindors, claiming that their purposes would be somewhat nobler (DH, Ch 33 The Prince's Tale):
“I’m just trying to show you they’re not as wonderful as everyone seems to think they are.”
The intensity of his gaze made her blush.
“They don’t use Dark Magic, though.” She dropped her voice. “And you’re being really ungrateful. I heard what happened the other night. You went sneaking down that tunnel by the Whomping Willow, and James Potter saved you from whatever’s down there – ”
It merely looks as the Marauders have managed to feed Lily with selected parts of the truth from that night, leaving out the tiny details of
who was luring Severus down the tunnel and f
or which purpose, but painting a neat picture of James as the hero… But Lily prefers sticking with these other boys’ version of the events, before that of her own best friend. Hmm…
In Snape’s Worst Memory (OotP), Lily valiantly steps in when she sees people outnumbering, bullying and humiliating her friend, which is admirable. But instead of loyally placing herself on his side and try to check on him, she seems a lot more interested in lecturing one of the bullies about his conduct in general… It’s hardly a coincidence that the boy in question is asking her out and flirting with her at the same time as he’s trying to impress her with his four-to-one dominance over his victim. And in spite of what she states, Lily seems to have swallowed the flattering bait in some sense; after her friend has rejected her presence with a foul slur, she actually sides with the bullies and then leaves her friend to their mercy.
Lily seems to be struggling with the issues of “good” and “evil” at the same time as she is discovering her own romantic feelings and tries to handle them – adolescence is never easy, and even less in a situation of war, I guess. She had a best friend in Severus, but she didn’t ever seem to need him as much as he needed her.
~~~
I like to look at Lily’s destiny as yet another representation of the Tale of the Three Brothers, a wizard’s fairy tale that plays a central role in the Deathly Hallows book. The Tale is about human choices and how they can be affected by arrogance, illusions and humility. Instead of the three brothers and their different choices of Hallows, I think we can discern Lily making three important choices in her life concerning love:
1. Lily lets go of her beloved friend Severus when he begins to glide down a slippery slope, finally turning her back on him after Snape’s Worst Memory when she refuses to accept his apologies. She is not offering him any other help than cold criticism, which has basically no better effect on him than Snape’s own criticism of Harry’s behaviour has on the boy many years later. Lily is attacking him verbally, but she doesn’t want to take in a word of what he is trying to say about his motives. Lily retains her pride and dignity, but Severus is lost to the Dark Side, a fact which eventually contributes to Lily’s own death.
I think her blind and stubborn belief in her own moral superiority, that she is taking a real stand against the Dark Side by condemning her friend’s association with it, resembles the oldest brother’s faith in the unbeatable Elder Wand. The Wand can be very useful indeed, but he uses it in the wrong way and, eventually, gets killed in his sleep.
2.Lily falls in love with the “bullying toerag” James Potter and nurtures (in my view) the
illusion that he has now changed his personality according to her will, which must feel satisfying. However, even if James does calm down a bit publicly, we are told that in seventh grade the hostilities between James and Severus continue as before. Lily doesn’t get to know about this and she proceeds to marry James after school is finished and to have a family with him. As an adult, James still seems to remain rather arrogant, though. He prefers to trust his old gang of reckless Marauders and their supposed brilliant ideas, rather than accepting Dumbledore’s offer to be Secret Keeper - a choice which also involves Lily and contributes to her death. As Dumbledore says to Snape after her death;
“She and James put their faith in the wrong person”. It’s a bit like the second brother’s desire for the Resurrection Stone, which gives him an illusion that everything is fine and he can rely on having his loved one back. But he refuses to focus on any other world than the one created by the Stone, gets trapped by its deceptive power and ends up killing himself.
3.Lily’s third and final choice, though, concerns a love which is much deeper – the love of her son over her self. She shows herself ready to do anything – literally anything – to save Harry’s life when it’s threatened, which she also states to Voldemort. She ends up offering her own life in exchange for her son’s and she takes the killing curse aimed at Harry. By doing this she saves not only Harry, but a series of other people, which eventually leads to Voldemort’s final downfall.
It makes me think of the humble third brother in the Tale, who only asked for the protective Invisibility Cloak, a temporary way of hiding from death and hold it at bay, but who willingly gave up his life in the end, letting the protection of the Cloak pass on to his descendants…
***
I’m fully aware that the resemblance to the Tale of the three Brothers and their Hallows, their choices affected by hubris, arrogance, longing, illusions and humility, could be applied to other characters as well, for example Snape or Dumbledore, or to anyone among us, actually. I just think it’s interesting to explore this allegory in relation to Lily, since she has come across as one of the most "innocent" characters in the series. I don’t think she was that very innocent, but perhaps a bit naïve. To which extent Lily managed to make the “right” choices in her short life is up to anyone to interpret. She died very young and could obviously not have predicted the terrible events that lay ahead of her, nor reflected later in life over where her choices led her.
But, in the end, in the moment when Lily let go of all possible selfish purposes for her love, and gave up her own life to save Harry’s, that’s when she reached a true level of heroism, in my eyes. By doing this she not only saved her son, who became The Boy Who Lived with all its future implications for the wizarding world. Lily’s death at the same time made it possible for Snape to “come back to life” through the mission of protecting Harry, which eventually served the same purposes…
I also believe that the ultimate, truly invincible strength of Lily’s love for her son, as well as Severus’ love for Lily once he realized that she was threatened, is that their love was
unconditional; Lily and Severus didn’t depend on any counteract from the subjects of their love in order to put their own life at stake to save them. This is all so very beautifully expressed in the short words that Lily and Severus share in the series:
“I’ll do anything…”