I have been waiting to review this character, solely because her name grabbed me.

Submitted by Caravel-The-SeaWing!

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BASIC INFORMATION;;
------ Name: Caravel.
I love this name. I don't know why. I just love this name. A whole heckin' lot.

------ Age: 20.
Great! I'm really impressed with the number of 20+-year-old dragons I'm seeing here.

------ Gender: Female.
------ Sexuality: Straight.
------ Tribe: Pure SeaWing.
Not that many SeaWings around.

------ Abilities: All normal SeaWing abilities.
------ Relationship Status: Open.
Open as in single, or open as in she's in an open relationship? I'm assuming single.

------ Occupation: She works in a small town not far from the Deep Palace as a merchant, mainly selling jewellery she had either bought or crafted herself.

Finally an OC who doesn't live in Possibility.
Also, a SeaWing who lives underwater! People seem to forget that aspect. Having an OC live full-time there is pretty rare. Good job.

------ Family: She had lived alone with her mother, Porpoise, and her brother, Rapids. She would occasionally see her father, Harbor, who was a guard for the Summer Palace before it had been destroyed when she was two. Her father had died while fighting off Burn's forces.
Very sad - though a pretty realistic life for a SeaWing. I'll wait and see how you handle the death.
I'm a bit confused about your tense - I understand you're talking in past tense, but there's a few places where it sort of stumbles. I personally would change it to:
      "She used to live alone with her mother, Porpoise, and her brother, Rapids. She would occasionally see her father, Harbor, who was a guard for the Summer Palace before it was destroyed when she was two. Her father died while fighting off Burn's forces."
(If you'd like me to put this in a comment or PM so you can copy-paste, feel free to ask).

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PHYSICAL DESCRIPTION;;
Caravel has olive colored scales, with scattered darker scales here and there on her face and tail.
Well, I never. Are those... freckles?
Green is another thing people forget in SeaWings. There's a whole spectrum of green out there, and we're stuck to brightening blues and purples.

Her bioluminescent stripes a light green in color, and her fins mirror it, but are a darker shade in color.
A very accurate SeaWing description. It sounds like it'd all flow very well together.

She has unusual small, light blue eyes.
Small eyes definitely took me by surprise.

She has a slender and wiry build, and is slightly shorter than most SeaWings of her age.
I like the distinction.

She has a few faded marks on her scales from play-fighting with her brother. She also wears a worn bead necklace with mismatched colors and shapes.
I don't know why, but this set a very particular mood for me. I wonder where she got the necklace!

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PERSONALITY;;
------ Strengths: She is a kindhearted dragon, and usually treats other dragons that way. She is also intuitive and intelligent, and rather humorous.
Simple and sweet.

------ Flaws: She can be quite loud and overly talkative, making herself a bit annoying. She is also angered easily and sensitive about her own feelings. 
These balance out pretty well with her strengths, which I like a lot. You could expand on this overall, though.

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BACKSTORY;;
She lived on an island with a more rural town, scarce with other SeaWings. She lived there until she was about two, then the family moved closer to the Deep Palace after Harbor died, and was educated in a school.
I wish you'd mention a bit more about Harbor's death; it sounds like a pretty significant event. Surely it deserves some mentioning?

When she was eight, she left her family to get a job, and worked as a kitchen maid. There she had met a SeaWing younger than her, who had been found and brought in to work for Coral. She soon became good friends with the SeaWing, whose name was Manta (MantaTheSeaWing).
Fascinating.

After Manta had mysteriously disappeared one night, she became depressed from her loss and a few months afterwards left to live alone.
Slow down there.
I'd love it if you elaborated a bit on this - how did Manta disappear? You don't have to explicitly state this if you don't want to (for suspense and all that), but you can definitely foreshadow the disappearance and use that to give a clue as to how she vanished. If she ran away, perhaps she'd been acting oddly for the days before - too quiet, perhaps, or oddly snappy. If she was hurt or killed by another dragon, maybe the dragon could have acted with hostility towards her and Caravel. If she was kidnapped, put the kidnapper somewhere (e.g. "A group of mysterious, hostile outsiders began to linger about the village. A few nights later, Manta disappeared without explanation.").
Or you can just state it cold turkey, to shock. That could work, too. What matters is that you, the author and creator, know what happened (which I'm assuming you do).
Why did she go to live alone? Surely she'd want comfort after her friend vanished? You need to explain what went through her head to motivate her to leave for solitude.

After a few years of making jewellery she had found on the beaches, she decided to make a business from it and sell them.
I thought she wanted to live alone. Once again, you need to elaborate on the change of mindset.

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COMMENTS;;
------ The good...
Overall, Caravel is a very good character, with some pretty interesting concepts. Her physical description flowed nicely, and you've got a lot of information covered.

------ The bad...
The only thing I'd urgently like to mention is Caravel's backstory. You need to consider her motivations, and maybe expand on some of the details in there - especially Caravel's own feelings and reactions.

------ How you can improve!
Just open up and expand. Your personality could use a bit of flavouring - show us, don't tell us! And perhaps consider jiffying up your sentence structure: it doesn't all have to be "She is adjective, adjective and adjective.". In her backstory, consider how Manta disappeared, how she felt about it, and what motivated her to leave to live alone. Also, I'd devote a bit more attention to Harbor's death if I were you.
On a final note, perhaps look at your sentence structure too. In some places it was a bit awkward and the flow was interrupted.

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OVERALL RATING;; 7/10.
Thank you for submitting Caravel! She was super fun to rate.

Guess who's done done done with school assessments? THIS KID RIGHT HERE. So I'll probably pick this up properly, at least for a while.

- Siri Mom.