(Decided to do a drawing for this one!:D)
❗️IMPORTANT DISCLAIMER❗️
(So, in this story it talks about her enticing sailors, by that they just mean she couldn't trick a sailor into the water by pretending to be a human child drowning & that their expectations for her adulthood were low, not that she as a child was trying to...yeah, felt this was important to say—)
⚠️Mention of ED, Bullying, Depressing aspects, probably French misspellings⚠️

She was considered the ugly one of the group. She couldn't entice a sailor with all the jewelry in the world, & the other, more human merfolk, made sure she knew it. She couldn't be a mermaid! She had to be a sea monster! She developed a eating disorder at a very young age from the bullying & often hid in the deeper parts of their hunting grounds. At only 12-years-old she was ready to kill herself, not that she would survive anyway. She was basically just skin & bone, as she didn't bother hunting for herself anymore & anytime she was brave enough to ask for food, they'd only make fun of her & give her a few scraps. She had been eating only fish, which wasn't nearly enough to sustain any merperson. That's when she found you, a human child, also 12 years of age. You were so nice to her, even if her expectations were low, you easily made her heart flutter! This is how it went:
"YOU'RE A REAL MERMAID?! Oh-sorry! It's just...you look so different!"
She felt embarrassed, sinking into the water.
"Yeah...I'm sorry—I shouldn't even be showing myself to you-"
"No, it cool! The mermaids on my fathers pottery seem so boring! You're so pretty! I mean- look at your eyes! They're so blue!"
You smiled & started bouncing a little, your dress waving a little bit.
"Really? You think I'm...I'm.."
"PRETTY!! Oh—sorry!"
The mermaid giggled.
"No, I like your excitement, enfant éstrange!"
"...What does that mean?-"(sorry if you know French-)
"It means we're friends now!...right?"
She realizes that just because you complemented her, doesn't mean-
"YAY! I'M FRIENDS A MERMAID!!"
"Hehe...my name is..well, my parents didn't like me, they just called me "monstre"."
"Can I name you something?"
"Go ahead!"
She said, a smile on her face.
"Uhm...uhhh...Blue! Because your so blue!"
"..hehehe! Yeah, better than 'moche' or 'perdant'!"
Well, so much for feeling depressed.
That's where it all started. Your father was gone a lot & your mom was...well, 'gone'. But that just meant you & her could have fun! Blue cherished you, she actually started eating again because you would bring her food. she didn't even want to believe you were human. You had to be the daughter of a goddess, I mean, you were just so beautiful & sweet! At this point, the only question was were you the daughter of Aphrodite, Persephone, or Selene? Hehe!
As the years went by, her love for her only grew. Love that you were somehow, ignorant to. Now, at 20-years-old, you looked gorgeous! She couldn't believe she was aloud to even breath the same air as you! She didn't deserve it...she didn't deserve you. Yet, she couldn't stand being away from you! She had to be with you for forever!
Today you sat on the same rock you sat on when you talked with her as a child. It felt so nostalgic to both of you, despite rarely ever meeting anywhere else.
"Wow...8 years"
"Yeah! That's pretty insane! I've never had a friendship that long!"
Oh...right. You two were still 'friends'. She didn't like that title to you & her relationship.
"Why do you look so sad? Did something happen? Who's knees do I need to steal?"
Once again, you ruined any chance of her crying herself to sleep.
"No, no, it's just..."
"Yeah? Hey, if you want to talk about it, I understand!"
"No, uhm...I was just wondering..."
Here she goes!
"Would you like to be my girlfriend? I know I'm not the prettiest girl, & I'm not even human, but we've been just friends for so long, & I've loved you for years—"
She stopped once she saw your expression was a mix of sad & nervous.
"Sorry, Blue, but...well, I'm getting married to another women! I was going to tell you today..."
Her heart felt like it was stabbed, she could swear she could feel the blood running down her body. But nothing was there.
"What?"
She sounded angry.
"You never mentioned another women before, & now you're getting MARRIED TO HER?!"
She just couldn't believe it. This had to be an arraigned marriage, humans have those, right? For money? She had plenty of gold that she took from sailors, she could provide.
"I-I...I've never heard you yell before."
It was true. Worst you ever got was her squealing in excitement.
"What did you expect! Why are getting married to her?! It's because she's pretty, isn't it?!"
"No! It's just we share a lot of things together &—"
"BULLSHIT!!"
She had never cussed either...
"...It's because of your father, isn't it? He made you marry her, didn't he?"
She didn't want to believe her goddess would leave her for some pretty rich girl!
"Blue, calm down! We can still be friends! I won't pay any less attention to you!"
"NO!! Friends isn't good enough!"
She grabbed your feet & dragged you into the water.
Why hadn't she done this sooner? For 8 years she had a goddess right in front of her & never thought to just take her? Of course this would happen! So many suitors for such a women, why would she ever chose the mermaid?
"Don't be scared, ma amor! I won't drown you, I'm not stupid.."
She held you close. You felt so warm.
"You just don't know how much I adore you...how much I need you...more than anyone! You're the only one who loves me, ma dèesse!"
She brought you far away, to a dangerous cave that all sailors who knew where it was knew it was infested with sirens. Just a little bit of hostility from Blue made them stay away from even the idea of eating you. Unlike with the mermaids, the sirens thought she was a dangerous sea monster, & they are smart enough not to mess with those.
So, that's where you lived. Blue gave you food & clean water, & a few other drinks if she could find any. She praised you through the years, especially your body. (You know what I mean)
(Sorry this was so long-)