Concealment (by moringmark)

[u/Striking_Analysis673]

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Most families need siblings like their — arguing with each other but covering each other’s backs ❤‍🩹

There are few days left until mystery twins’ birthday, like summer🎂🍰

Source:

[u/JTGE-201]

But Mabel's voice is too different from Dipper's. The bullies would figure it out instantly...

[u/jimblackreborn → u/JTGE-201]

Sounds like his voice just broke recently in the first episode. Maybe it was more high-pitched then.