who is that?

Sara has more then one au or void. she is 20 years old. she never gets old or well grow she is forever 20. she has powers and it's a human....kinda....anyway no one knows her. no one know how she even looks like. Ink, blue, sans, dream, error, and many other sans have encountered her when there fighting each other. but she only appears and saved whoever is in danger like kid or in this case frisk. what happened if one of the sans's falls in her au???!

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