'SPOILERS! 'If you haven't read the entire series, I would strongly suggest leaving this page.
Lorina Liddell is the older sister of Alice Liddell and Edith Liddell. She is protective of her siblings and stepped up to to act as a mother figure for them when their mother died. Alice particularly loved spending sunday afternoons with her sister. For much of the series Lorina is Alice's main motivation for returning to her own world.
Alice's first love rejected her because he was instead in love with Lorina.
When Alice was 20 years old, Lorina died of the same illness that their mother had.