"Neptune is very kind or possibly super mean and hates us. But that's okay. She's really funny. Neptune looks in no way like she's supposed to be here. But that's why she's here, of course."
Neptune is bossy and fashionable, and doesn't care what others might think of her or how her own actions might affect others. Neptune typically behaves as she would like to, with little regard for others' approval. While she can be nice to those she cares about, her tone comes off as rather abrasive and sarcastic most of the time.
Neptune does genuinely care for Jupiter and Venus; however, her ways of showing it are somewhat unconventional. Rather than outright declaring it, she demonstrates her feelings towards her friends in more typically aggressive speech and actions, such as threatening to hit Jupiter if she doesn't stop blaming herself.
- In the opening scene, Neptune is texting/using a messaging app to talk to someone who she has saved in her phone as Idiot<3Jerkface
- Her username on the messaging app is RestingWitchFace
- Neptune wears star earrings which look similar to sailor moon's star/moon earrings, which is likely done on purpose, as Sailor Moon is mentioned in the description of the game: "WE KNOW THE DEVIL is a story about everyone who made you cry at summer camp. It’s about missing your Sailor Moon VHS tapes."
- Neptune has an odd sleep schedule, being excellent at waking up and falling asleep, but only on her own schedule.
- She plays the card game Euchre
- Neptune got housed into Slytherin by a Harry Potter quiz (mostly likely the pottermore one)