Luna's cheeks immediately colored when Ginny said 'best friend'. To Luna, Ginny was her 'only friend'. It was still rather momentous to the young blond to be considered the best of Ginny's friends.
"It is quite alright, Ginevra. I am sure you can borrow one of Luna's nightgowns," Mr. Lovegood answered, not knowing Ginny had come prepared.
Her cake finished, Luna clapped excitedly. It was now time for presents! Receiving her father's first, she tore it open to discover a box of chocolate frogs, a new quill, and a stuffed panda that meowed. Thanking her father, both Lovegoods then looked at Ginny expectantly.