A/n real quick: I don't know much about Sirentale Sans but I'll try to get his personality right.
Always singing and writing new songs and then practicing singing them is what Y/n would have to do and she had a lot of fans along with a boyfriend who's a siren she would go to visit him at his pool that he would be in all the time. Y/n had went to him today after her performance putting on her swimsuit and getting in and swimming over to him giving him kisses and hugs as he kissed and hugged back they had a water fight. And when they were done they cuddled in the water even though Y/n's feet were hurting she didn't mind as long as her boyfriend was happy that's all she wanted him because she loves him that much Siren kissed her more she returned the kiss and hugged him again. He hugged back and his tail wagged in excitement before he tackled her making her laugh and poke him cuddling him more.