Maia Mizuki is the main protagonist of the anime series 'Hikari to Mizu no Daphne' (known as 'Daphne in the Brilliant Blue' in English). She is a young, optimistic woman who dreams of joining the Ocean Agency, a prestigious organization within the underwater city of 'Aquarius'. However, her life takes an unexpected turn when she fails the entrance exam and finds herself jobless and homeless. Maia's journey begins when she joins 'Nereids', a private security and mercenary company, where she gradually discovers her hidden talents and uncovers secrets from her past. Her character is central to the series' themes of self-discovery and resilience.