Spoliers... As usual!!
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11. Peter Pettigrew became a spy for Voldemort after Harry was born (because you know, we need more pain about the Marauders apparently 😔).
12. Harry's first birthday present from Sirius was a mini toy broom. After 13 years, Sirius gave Harry a Firebolt to make up for the amount if birthdays he'd missed.
13. Remus Lupin loves chocolate.
14. Hermione faked being head-over-heels for Lockhart because she just wanted to fit in.
15. Luna Lovegood's mum, Pandora, is the reason she can see Thestrals.