I'm just gonna get started right away. This OC is also by Shadar-Kin18 enjoy.
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Name: Kyoto Takimi.

Nice name

Nickname: Taki, as in the hot snack food.

Ok

Gender: Female.

Ok

Age: 12.

Ok

Birthday: July 31st.

Cool

Status: Alive.

Nice

Voice Claim: Erica Mendez.

Another voice cool

Appearance: Medium length brown hair, chocolate brown eyes, and thick eyebrows. Fair skin. Her ninja outfit is a shoulderless black long sleeve with ninja mesh underneath, a red skirt with ninja mesh covering her legs, as well as black sandals.

Good I can picture it.

Height: 4'8.
Weight: 70 lbs.

Why are you making your characters so skinny? This appearance would have no body fat and you need fat in your body.

Scars: Several on her hands.

Ok

Piercings: Ears. 

Ok

Distinguishing Features: Aside from her hand scars, there's nothing unique about her appearance.

Ok

Bad Traits: Hot-headed, Sassy, Know-it-all.

She also has a generic not mean girl but almost tsundere personality in terms of traits just without the love interest.

Good Traits: Curious, Open-minded, Goal-Oriented.

Good

Likes: Traveling, Cooking, Studying, Training, Hanging with friends.

So both girls have the whole likes to train aspect? I said it once before just because you're a ninja doesn't mean you like training just like how you may be a violinist but you don't like practice. You gave the same trait to both females.

Dislikes: Disorganization, Small bugs, and Naruto Uzumaki.

Ok but why Naruto? Please explain

Talents: Chakra Control.

Ok

Clan: Takimi Clan.

Ok

Clan Information: A major merchant clan of Konohagakure.

Oh that's different, that's cool

Ninja Rank: Genin.

Ok

Sensei: Vectrice Uchiha.

I addressed this last OC.

Teammates: Aubrielle Kiriguya and Sazaku Ryu.

Ok

Chakra Nature: Fire.
Ninjutsu: 3/10.
Taijutsu: 2/10.
Genjutsu: 4/10.
Teamwork: 3/10.
Intelligence: 6/10.

These are good

Family: Dan and Hina Takimi.

Ok

Friends: Aubrielle Kiriguya, Ino Yamanaka, Several of the merchants that work with her parents, as well as Tenten and her family.

Nice

Enemies: Shino Aburame, but playfully because he knows about her bug phobia.

Oh ok.

Rivals: None.

Ok

Sexual Preference: Straight.

Alright

Love Interest: None.

Ok

Theme Song: Near's Theme.

Again you have to put where it's from. Again this is from death note for those who don't know.

Backstory: She was brought on trips across the Ninja World as her parents traded goods, as well as escorted people. What dazzled her was the different styles of cooking she'd come across in different countries. So that is what she studied for a long time. When she began growing into a preteen, becoming a ninja became a goal as they were allowed to go to different countries all the time on missions. And Taki knows that there is more to see out there in the world.

This is actually really good. Great job.
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Final Analysis- There was little information but I got the gist of her. Like with your last OC liking training is like liking dogs as a personality. It doesn't define you, just because you like food doesn't mean it's a personality trait. Other than that this OC is good. Thank you so much for letting me review your OC. It was an honor.
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