On The Young and the Restless, Mariah Copeland arrived in Genoa City as a con artist hired to impersonate Sharon Newman's deceased daughter, Cassie. Over time, Mariah shed her deceptive past and became a beloved character. She developed a close bond with Sharon, eventually becoming her surrogate daughter and working alongside her at Crimson Lights. Mariah also found love with Tessa Porter, and their relationship has been a central storyline, culminating in marriage and the recent adoption of a daughter.