Mika is the adopted daughter of Carol Peletier after her father is bit by a walker and put down. She counts to two with her when Carol is about to kill their father in mercy. She does seem intolerant with her sister's somewhat erratic behavior, calling her 'stupid' when Lizzie gets upset over the walker she'd named being put down. She is also somewhat wary of her sister's mental state, as she warns Carol soon after Carol becomes their guardian that something is just wrong with Lizzie. Carol later kills Lizzie because she can no longer be around people.