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If this is a verbal tenancy agreement, then it would be considered a month to month rental under MN law and either party could terminate the tenancy with a 30 day written notice to vacate. Then if she didn't move out, you can pursue a formal eviction action through the courts in order to get an eviction judgment and a writ of possession that the sheriff will execute to physically remove her from the property. This takes about 3 weeks after the 30 day notice expires depending on the court's and sheriff's schedules.
As for damages, if she is damaging your property, you can sue her in small claims court for any damages that she has caused to the property if you wanted to pursue the matter.