(She is. Cute. I don't dislike her much at all but...don't like her a ton either.)

Name:  Mitzuka

General Appearance:  She looks like a female version of Mitsuki combined with a female version of Suigetsu. She has a slim, athletic figure, not very curvy. Her eyes are light purple and speckled with lavender, and her hair is light blue, with white fading streaks.

Height: She's rather tall, a little bit taller than Sasuke and Kabuto.

Age(s): {Child arc, 7} {Post-genin, 9} {Genin, 12-13} {Chunin, 13-14} {Shippuden, 15-18} {Adult, 19-21} 

Sexuality: Straight. (No. She is bi now <3 )

Backstory: She was created in the boruto timeline, after Mitsuki as the perfect artificial human. She has Otsutsuki blood. With all her abilities, and strengths, there was one problem. In her own timeline, at the age of five, a 12-headed serpent demon was sealed inside of her. From that point onwards, she began spending a lot of time inside of her head, alone with the demon. This caused her to undergo some mental and sensory deterioration, with her talking to herself a lot and losing her emotions and her abilities to feel. Finally, Orochimaru sent Log to take her back in time with a specific jutsu, where Log placed her under the care of Kakashi. (This took time in between the child arc and the post-genin arc) After being sent back in time, neither she nor the demon remembered their past lives. However the demon had slight glimpses of it.

When she was younger her sharigon was always activated. After a while she learned how to cut off the chakra flow to her eyes, so she wouldn't send everyone into the nightmare realm for a moment when she made eye contact with them. Her eyes stayed the same until she was a genin. It never changed her sight. For her, if her Mangekyō was activated then the Tsukuyomi was automatically activated as well. (Wow I don't even remember how this was supposed to work lmao.)

She has a copy of the Sharingon possessed by Itachi after he was reanimated. However, until chunin she only had the Mangekyō and the Sharingon.
She became chunin with team seven, and then left the village with Sasuke, following a trail of chakra that drew her to Orochimaru. She then joined him.
She unlocked Amaterasu after Orochimaru's death, where she fought against Sasuke briefly but eventually left the fight, concerned that Kabuto was dead or dying.

After that she spent most of her time following Kabuto. She assisted him with his plans, made sure that he wasn't hurt, and basically became what Kabuto had been to Orochimaru.
She helped him in transforming, along with gathering the DNA of several shinobi for his reincarnation jutsu. She joined the Akatsuki for a while to gather information and their DNA, leaving to rejoin Kabuto after a while. During her time with the Akatsuki, she unlocked her Susanno, which was black with purple and indigo blended in, like the galaxy. 

She figured out how to use Tsukuyomi during the war, remaining on Kabuto's side until the battle against Madara, where she realized what would happen if Kaguya was brought back.
Ironically, it was during the fight with Madara that her and the demon finally got along with one another, joining forces instead of trying to control each other.
After that, whenever she used the demon's chakra, she would transform, slightly like Naruto. Her skin would take on a grayish tint and she would be surrounded by an aura of icy blue chakra. another thing about this stage was that if she was cut, her blood was a purplish-gray color.

She fought against Kaguya and later was one of the main reasons as to why Orochimaru and Kabuto eventually allied themselves with the leaf. Ironically, she and Sasuke both fought together to distract Kaguya while Naruto, Sakura, and Kakashi sealed her away.
Afterwards she usually spent most of her time with Orochimaru and his former subordinates, or with Kabuto, though she would sometimes visit team seven. She was the adult to guard Boruto's team several times when they went up against real rogues, and went on missions for the Hokage. She finally lost her hatred for Sasuke, and she accompanied him on some of his expeditions as they finally became allies.

Seal: Her seal is on her back, with the kanji for dragon surrounded by twelve markings, in a style similar to the five-pronged seal, at least for the design. The whole thing is inside of a sort of flower outline pattern that's purple. It was originally on the left side of her neck, and was black without the twelve markings, but after she joined Orochimaru he was forced to redo the seal after it broke and allowed the demon to take over her.

Demon: Not much is known about the demon. It appears as a twelve-headed serpent, but it can change sizes and coloration, even with the ability to turn itself into any time of snake creature. It has a connection to the number 13 and the gemstone Rose Quartz. It also has an amethyst gemstone set into each of it's foreheads.

Mental issues: Depression, PTSD, nightmares, anxiety. Her depression likely caused by the demon, and her habit of underestimating herself/not giving her skills enough credit. The trauma disorder is caused by the demon. Her nightmares are from her history with the demon, and her anxiety is only about her nightmares and storms. She doesn't sleep much, preferring to only sleep when around the presence of someone she trusts, therefore canceling out her nightmares.

Star sign: Scorpio.
 Zodiac: Year of the Dragon.

Abilities: She knows an extreme amount of different chakra natures and ninjutsu, though she isn't that good at creating genjutsu. She is very fast and nimble, but not very strong. Since she's not good at genjutsu, she makes up for that with her chakra scalpel jutsus and her agility. Her best chakra elements are Fire and Water, and she has a Yang release chakra affinity. She can use kekkei genkai she copies with her Changeling jutsu. She's average in taijutsu. She's high level in Ninjutsu and knows the basics of a bit above average Taijutsu, but she can't use genjutsu well, though she can see through and identify it.

Weaknesses: Her weaknesses were created after the sealing of the demon, the worst ones being fear of storms and sometimes she'll become paralyzed, talking to herself. She is also vulnerable to earth jutsus. She has very sensitive hearing and eyesight. She's sleep deprived, because the demon gives her nightmares.

Ninjutsu: Chakra scalpel, Changeling jutsu, Summoning jutsus, and other ninjutsu.
Most of her own jutsus revolve around reptiles, felines, and darkness.

Best friend: Suigetsu/Tayuya

Crush: Kabuto. She also gets very protective of him if he's hurt.

Alternative crush: Sasori.

Mutiship{Open}: Kabuto, Sakon, Kimimaro, Suigetsu, Sasuke, etc...

Personality: She dislikes Sasuke, due to the fact that when she first arrived at Orochimaru's base he would follow her around, trying to find out why she had the sharingan (Which was, in fact, a copy of Itachi's own Mangekyō ).  

She is calm and calculating, but she's also a little sweet and dislikes having to kill. However, when the demon gets hungry she has to find blood or chakra for it to feed on. When this happens the sclera of her eyes turn black and she becomes very cold and scary/intimidating. She'll also grow agressive and dismissive. She's rather mischievous, and slightly childish during the genin-chunin arc. Her personality doesn't change much over the years. She gets clingy and kind of affectionate during storms when she's scared. She's a little shy relationship-wise. She does NOT have a swearing problem-(Unless she's irritated or using the demon's chakra-) 

She's actually quite easy going around Suigetsu, as he's her best friend. Towards the beginning of the shippuden era, they would actually get into short "failed flirting battles" when they saw each other, where Suigetsu would start with an actual pickup line, and she'd create a cynical or teasing answer for it, which caused some jealousy on Kabuto's part since she was always slightly hesitant or unsure/nervous around him. The rest of Team Hebi found that amusing. The "battles" would either stop when one of them ran out of ideas, or if Sasuke showed up.

Nicknames: She doesn't really call people by nicknames, apart from calling Kabuto "Kabuto-senpai", Orochimaru "Lord Orochimaru", and Sasuke: "Sasuke-kun", all habits that she stopped during shippuden after Orochimaru's death.
Nicknames for her include:

Mitzuka-kun/Mitzuka-chan  -Kabuto&Orochimaru
Dear/Child -Orochimaru
Snake Girl -Kakashi
Loser/Fake Uchiha -Sasuke
Snaky - Kidomaru
Snek Girl -Suigetsu
Reptile Bitch -Karin
(Huh??? Human Aphophis -Hagoromo Otsutsuki 
Moon Serpent -The Akatsuki
Cobra Flower -Kimimaro
Sapphire Lizard -Sakon&Ukon
Creeping Death -Gaara
Snow Reaper -Indra  )
Ink Snake -Sai
Mitzu Chan -Kabuto&Suigetsu
Mita San -Mitsuki

Extra: A nickname that Madara once called her while she was working with him and Kabuto was "My little spy." This served to enrage her and she put a chakra-filled hand through his chest, telling him; "If you ever call me that again we will rend you limb from limb-" ("We" refering to her and the demon sealed inside her.) While this didn't hurt Madara, he never really did call her that again, and it freaked out many of the shinobi who were there at the time.

Likes: Orochimaru and Kabuto's approval, sweets, reading, jumpscaring Sakon and Ukon, training with Kimimaro, reading, hanging out with Suigetsu and Tayuya, nighttime, and snakes.

Dislikes: Storms, having to work with Sasuke, being stalked by Sasuke, disappointing Orochimaru, being viewed as weak, bugs, Jirobo, Karin, Kidomaru, breaking bones, and bright lights.

Child arc appearance: She looks like a female Mitsuki, but with sharingan eyes.

Child arc hair:

Child arc eyes:

Post-Genin appearance: Her hair is longer and a little paler.

Post-Genin hair:

Genin appearance: Her eyes are now red(ish) with normal sclera and her hair is longer and        ice blue/white with light blue streaks. She's about the same height as Sasuke.

Genin outfit:

Genin hair style:

Chunin appearance: Her hair is now whiter with ice blue highlights, and her eyes have changed to light purple.

Chunin eyes:

Chunin hair (Think this, but shorter- with the ponytail end stopping slightly above her hips.) :

Shippuden appearance: She's unlocked her otsutsuki form, her hair is a lot longer, her eyes are now tinted blue. She has a light purple streak in her white hair, and light blue highlights. 

Shippuden outfit:

Shippuden hair:

Otsutsuki form :

Otsutsuki hair:

Otsutsuki eyes:

Adult form (Think of a cross between the two):

Adult outfit:

Theme songs:

https://youtu.be/OmKLAS665J0

https://youtu.be/OQQ7zhzacbo

https://youtu.be/EaUeqDm7RDc

https://youtu.be/zkXlSbuCs-E

https://youtu.be/plFe27sXXVY

https://youtu.be/H4xE0u4OQcY

https://youtu.be/BKFkFlySof0

https://youtu.be/nievF0di6f0

https://youtu.be/O-iOkH13zxs

https://youtu.be/KheI_qHGT1o

https://youtu.be/BByMzI1YjKA

https://youtu.be/JE1rkR7uab0

https://youtu.be/fQnrET33VyU

https://youtu.be/8LY5SdU3Afw

https://youtu.be/dfkgdAwQE88

https://youtu.be/rKKaw9gmI6E

https://youtu.be/lchZurZgsEM

https://youtu.be/89EjtCuqcG8

https://youtu.be/sLgMbIdI82A

https://youtu.be/YUS7tZL17Ak

https://youtu.be/xkIytYlDD_o

https://youtu.be/7ERi9Y4QW1A

https://youtu.be/88HQMBLHTQM

https://youtu.be/ApX-w2rTxvY

https://youtu.be/ljR3gQTuauE

https://youtu.be/tP9JscsrwN0

https://youtu.be/U3N3JsV4ZII

https://youtu.be/onNRbE1t6Og

https://youtu.be/Hwe2Jw1lvxI

(Hot milk, paper planes, Stronger then you Frisk version, Stronger then you Error Sans, Control, iNsAniTy,  Class fight,  Come little children, Lies Itachi rap, Monster skillet, Pretty little psycho, Mind brand, Symphony, In the name of love, GRRRLS, Genius, bury a friend, Believer, Lost boy, The hype, Dollhouse, Doubt, Eyes on fire, Stronger then you Chara version, when the party's over, Dark darker yet monster, Wonderland, Be mine)