Lotta Emilia Kaihua (born 12 July 1982 in Kemi) is a Finnish actress. Kaihua is best known for her roles in Q Theatre, in addition to which she has appeared in films and television series.

Kaihua acted since childhood in the Joensuu Children's Theatre, Youth Theatre and Student Theatre, among others. He was admitted to the Theatre Academy in his final year. Kaihua graduated from the Theatre Academy in 2005 with a Master's degree in Theatre Arts.

Alongside this, she pursues a career in film and television. On screen, she has notably appeared in the films Tyttö sinä olet tähti (2005), Kulman pojat (2012), and Häiriötekijä (2015), as well as in Finnish television productions such as M/S Romantic (2019) and the medical series Syke.