There are some merfolk who mate for life, much like the Twinspot Goby fish, though these type of merfolk are very rare, and hard to pick out. A merfolk who mates for life is referred to as a Twinspot mer, when one meets another, their tails glow in a beautiful array of spots and they are mated.
Along the Great Barrier Reef there is only one known Twinspot couple, Adam and Takashi Shirogane. The younger of the two merman had a guppie brother alike to them, he too was a Twinspot merman. Adam adopted him as part of their pod and they named the guppie Keith, when he was about 3 years old he was introduced to Pidge, Shiro and Adams daughter. The little green guppie was not a Twinspot mermaid but this didn't stop the two from becoming the closest siblings and the best of friends.
When Keith was 7 Shiro brought home a young yellow tailed merman, around 6. The small mer had lost his pod and was left behind, Shiro and Adam had invited him to join their growing pod and they all became friends, his name was Hunk.
(Also Adam is alive in this :T)
"You're different from what I expected," she said softly.
"How so?" he asked, glancing at her.
"I don't know," she replied, searching for the right words. "You just... have this way of making people feel like they matter. Even here, in this... nightmare."
He was quiet for a moment before responding. "You matter, Y/n. Don't forget that."
OR
Y/n wakes up in the deadly Squid Game, surrounded by strangers and fighting to survive. What she doesn't know is that the mysterious Frontman is watching her every move through the cameras- and she's caught his attention.