Dr. Louise Banks is a fictional character from the science fiction film Arrival, directed by Denis Villeneuve. She is portrayed by actress Amy Adams and is a linguist tasked with communicating with extraterrestrial beings known as heptapods. Her expertise in language and communication plays a crucial role in understanding the aliens' complex language and intentions. In the film, Dr. Banks faces personal challenges while navigating her professional responsibilities. Her character explores themes of time, memory, and the impact of language on perception. The story highlights her determination and intelligence as she works to bridge the gap between humans and the heptapods.