Hello

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not going back to search for actual chapter numbers but at least 4 people know by ch 20.

Did she explicitly told them that she is indeed the penguin or they did just know through diff circumstances (like they saw her change to penguin etc)

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she told one person directly. one person overheard her telling them. one person knew she wasnt a whale and confronted her so she told them, and the last person knew as soon as they met her.

Thanks!!! I think I know who is the last one