Luna Lovegood thought, Nova was the good type of odd, her mother once mentioned to her long before her violent death from spell experimentation.
She doesn't hover like Mrs. Narcissa does or solemnly stare intently like Lord Lucius. She's just a hand brush away and a soothing lullaby at night when she crawls into her bed to chase away the nightmares.
It had taken her dad two weeks to realize she was missing and that type of hurt was still etched deep within her ten-year-old heart.
The pain is still there, but she's contented Nova managed to allow her to start school with her instead of waiting a year.
I guess there were some perks if you were close to the headmaster.