The Genius Mermaid

Persephone Jade Johnson was barely a teenager when she was killed by her abusive boyfriend after finding out he was cheating on her.
When she opened her eyes, she found a man who called himself death, he offered her a second chance in the H2o just add water universe which she took, only to wake up as Persephone Jade Bennett the younger twin sister of the one and only Zane Bennett, Persephone knew she would not have it easy, but she also knew she would persevere.

"Of course, you can pick the universe you get reborn into, I'm not cruel".