Seira (星羅 Seira) is a supporting character in the second season of Mermaid Melody, succeeding the former Orange Mermaid Princess of the Indian Ocean Sara. Her name can be a reference to Sara's name. Seira is Sara's successor and she was absorbed right after she was born, leading Lucia having to collect her fragments that are trapped within Mikeru's wings and teach her the wonderfulness of loving someone at the same time.
In the series, Seira tries her best to help everyone despite being absorbed into Mikeru. She is always there to encourage the others, especially Lucia. Seira is a very strong mermaid princess. When Seira was absorbed into Mikeru, she still was able to protect the others at times when needed, but at episode 36, Seira could not escape from Mikeru's territory. When Mikeru absorbed her fully into his body, she appears to Mikeru as a spirit, and sings Birth of Love, trying to cheer Mikeru up. She comes to know that Mikeru's true self is a fossil, and feels sorry for him. She understands Mikeru and Mikaru's loneliness, and tries to save them, hoping her songs will reach them. She was the first to truly care about Mikeru. After Seira's fragments were collected and she was reborn, she did her very best to help Mikeru rest in peace.