Uma TailFin

Uma TailFin is a mermaid who made her debut in Esa's Song. She is Esa's rival.

Bio
In a flashback Esa shared, Uma was as dramatic as a child in Mermaid School. When Esa first met her in kindergarten, they were good friends. They challenged others to see if they're good as them. Their friendship was strong and robust. But that changed one day when Esa and Uma as teenagers were competing in the Atlantean Talent Show separately. Uma was proven to be better than Esa and has become the most popular girl in school. Fame changed Uma completely. Uma wanted to challenge Esa to making a tower out of pencils. Esa was winning, but Uma 'accidently' knocked the table with her tailfins, causing Esa's tower to fall. Uma then wins the challenge. Esa was so sad, she swam to their secret hideout at the end of the day and placed pictures of them together when they were best friends. She placed flowers there as if this was a funeral. Ever since, Esa never signed up for the Atlantean Talent Show, but she always saw Uma win a gold medal for five years. She wondered what the old Uma would think if her best friend wasn't there to see her win. Esa never talked to her ever since.