Lily L. Potter

Lily Luna Potter (born between September 1, 2008 and August 31, 2009) is the only daughter and the youngest child of Harry and Ginny Potter. She was named after her paternal grandmother, and her parents' good friend, Luna Lovegood.

Biography
Lily Luna Potter (born between September 1, 2008 and August 31, 2009)  was born to Harry and Ginny Weasley as a youngest child and only daughter. In 2017, she went to see her brothers Albus and James, and her cousin Rose, off at the Hogwarts Express, but was not herself old enough to attend Hogwarts School of Witchcraft and Wizardry. She and her cousin, Hugo Weasley, are around the same age, as Hugo is also not leaving on the train to school. Lily is two or three years younger than Albus, who is at least a year younger than James.

Physical appearance
She is the only one of the Potter's three children that is stated to have Ginny's red hair. Like Albus Severus, who resembles their father very closely, she resembles her mother closely as well.

Personality and traits
Lily seems to have a personality similar to her mother. She is very jealous of her two older brothers when they are leaving for Hogwarts. From the all Potter's children, she seems to be the quietest, just like her brother Albus. Like Ginny, she may also be competitive as she is the youngest and only girl.

Parents
Lily is shown as very strong bonded with her father. She resembles her mother in appearance and personality.

Siblings/Cousins
Lily's personality is similar to her brother Albus, she is shown as a quiet child. She went to see her brothers off at the Hogwarts Express.

Hugo and Victoire Weasley are probably her favorite cousins. She and Hugo often chat about Hogwarts, and she was thrilled when she heard about the relationship between Victoire and Teddy.

Teddy Lupin
Teddy seems to be the closest with her and it could be indicated when she said that she desperately wanted him to marry Victoire, so he could be an official member of her family.

Behind the scenes

 * Lily's middle name is Luna, after Luna Lovegood. However, Luna is Latin for moon, so she may also have been named in honour of Remus Lupin, since his nickname was "Moony".
 * Lily was the first of Potter's children to be introduced in the epilogue, where she was shown holding her father's hand, much as her mother was introduced in Harry Potter and the Philosopher's Stone.
 * Like her mother Ginny, Lily was the first baby girl born to Potter family into several generations. Her paternal grandfather was only child just like her father.

Appearances

 * Harry Potter and the Deathly Hallows