A korean webtoon about a girl who is either transmigrated or regresses in time. The story stars off when she is young. She is a powerful elementalist/summoner. There is a woman, who could be her step mother or former nanny, who is evil and betrays her to kidnap her. She gets out by summoning a spirit of nature that looks like gaia. She was also on a mission to fill a contract with another spirit, who is a old male ice spirit in the mountains. I can't recall much other than this arc and stuff, just because there are so many similar child manhwas with regression/transmigration. Also, no, this is not "The Golden Haired Elementalist".
Korean actress transmigrates into another world. FL has black hair and purple eyes. ML has white hair. They pretend to be lovers and FL has to teach ML how to act as a proper lover. This is all to find out the person who has been killing his previous fiances. A potential suspect is a blonde-haired girl who covets the duchess position.