It’s Snapchat, not SNAPchat.
When she's in the library taking a study break:
Lara Parker / Via Warner Bros. Pictures
When she's in the common room and spots Scabbers:
Lara Parker for BuzzFeed / Via Warner Bros. Pictures
When she's in Defense Against the Dark Arts and wants to scream:
Lara Parker / Via Warner Bros. Pictures
When she's walking the grounds and gets TOO excited for Quidditch season:
Lara Parker / Via Warner Bros. Pictures
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If Hermione Granger Had Snapchat