Character Synopsis:
Kaiden "Kai" Zev Nakamura forgot what it was like to feel emotions.

Due to his secret training with Dante Sinclair, he hasn't been in touch with his emotions and has been trained to push them down and ignore them in order to make his missions easier to accomplish. However, that was the currently him—there was a time where he did know what it was like to have emotions.

It was back when his brothers and him hadn't been secretly taken in by Dante Sinclair and their training to become assassins started.

It was back when his brothers hadn't mysteriously disappeared, leaving him behind.

It was back when his parents were still alive.

But then, fate decided to be cruel and Kaiden was forced to watch his parents get beaten to death when a group of mysterious ninja broke into their four-bedroom house while he lived in Tokyo. After that, it was just him and his brothers but Kaiden was okay with that, because he knew that as long as they were together, nothing could get in their way.

At least, that was until Dante Sinclair came into their lives.

Dante Sinclair was the man that secretly took them in and gave them a two-bedroom apartment in the Crystal Empire with the condition that they remain inside to stay hidden and in return, he'll give them everything they've wanted and make sure that their rent gets paid on time as in a way, Dante Sinclair became a father figure to Kaiden and his brothers. And for a while, as far as Kaiden knew, everything was perfect—after all, he had his brothers by his side.

What could go wrong?

But then, something went wrong and everything was no longer perfect.

At the age of ten-years-old, Kaiden woke up one day to find the apartment was completely empty with nobody but himself and with no sign of his brothers. The moment that everything came crashing down for him was when Dante Sinclair told him that it turned out that his brothers had decided to abandoned him as there was no sign of his brothers ever coming back within the apartment.

Starting from that moment, Kaiden had pushed his emotions down, ignoring them as he made sure to forget what it was like to have emotions while dedicating himself to his training as an assassin, pledging his loyalty to his father figure, who has taught him everything he knows and given him everything he's ever needed.

Fifteen years later, with the arrival of the lost princess and her family (Leonardo, Raphael, Donatello, Michelangelo, Eclipse [OC owned by GeekyCookie1], Henry Hart,  Kaz, Mara Sparks [OC owned by MariChat3], Zane Carson [OC owned by MariChat3], April O'Neil, and Casey Jones) Kaiden gets assigned a new mission by Dante Sinclair; one where Kaiden is assigned on the royal guard for undercover in order to spy on the lost princess and her family, learning their strengths and weaknesses.

Although Kaiden was supposed to learning their strengths and weaknesses, it wasn't the only thing he learnt. The more he spied on the lost princess and her family, Kaiden grew aware of their bonds with each other and noticed how much they cared about the other as deep down, he was reminded of how he used to be around his brothers.

And so, Kaiden finds himself forgetting about his original mission, he allows himself to learn from the lost princess and her family and finds himself coming into tune with his emotions once again, being reminded of what it's like to have emotions and feelings again.

Unfortunately, with those lessons he's learning comes secrets and betrayal as he learns that there's a chance where his father figure, Dante Sinclair was behind everything: his parents' murder, his brothers' disappearance and how he knew more than he let on.

So now, Kaiden finds himself teaming up with the lost princess and her family to bring an end to Dante and his plan. But along the way, it seems that Kaiden Nakamura may have caught the eye of a certain teenaged girl that happens to be a mutant snake.

FaceClaim as a Child:
To be developed.

FaceClaim:
Mackenyu Arata.

FaceClaim as a Adult:
To be developed.

Full Name:
Kaiden "Kai" Zev Nakamura.

Nicknames for him:
Kaiden [by everyone]
Kai [by everyone]
Baby Kai [by his three oldest brothers]

Nicknames for others:
To be developed.

Gender:
Male.

Nationality:
Japanese.

Ethnicity:
Japanese.

Birthplace:
Tokyo, Japan.

Hometown:
Tokyo, Japan [formerly].
The Crystal Empire [currently].
Tokyo, Japan [in the future].

Age:
7-10 [flashbacks].
19 [throughout the rest of season five of LS].
20 [Little Sister Spin-Off Book 1: Family First].
21 [Little Sister Spin-Off Book 2: Brotherhood of Evil].
22 [Little Sister Spin-Off Book 3: The Blood War].
Mid-twenties [Legacies: Little Sister Next Generation].

Species:
Human [currently].

Sexuality:
Straight.

Love Interest:
Karai/Miwa Hamato [current main love interest].

Family:
Daiki Nakamura - decreased biological father.
Sora Ito-Nakamura - decreased biological mother.
Ren Nakamura - biological eldest brother.
Akihiko Nakamura - biological older brother.
Isamu Nakamura - biological older brother.
Daichi Nakamura - biological older brother.

Dante Sinclair - father figure.

Relationships with his family:
Daiki Nakamura - decreased biological father. As a child, Kaiden admired his father and looked up to him, having always seen his father as someone brave. Unfortunately, at the age of seven, he witnessed his father getting beaten to death by a group of mysterious ninja.

Sora Ito-Nakamura - decreased biological mother. Just like his brothers, Kaiden was a big Mama's Boy as a child and would always bring Cherry Blossoms to his mother since he knew that those were her favorite flowers. Unfortunately, at the age of seven, he witnessed his mother getting beaten to death by a group of mysterious ninja.

Ren Nakamura - biological eldest brother. Kaiden had always shared a natural-brotherly bond with him but he does tend to get annoyed when his brother getting bossy and treats him like a baby.

However, when Ren comes back into his life with Akihiko and Isamu to get his help, Kaiden refuses to go anywhere with them until he learns that it's Daichi who needs help getting rescued from the Foot Clan.

Akihiko Nakamura - biological older brother. Although Kaiden did share a natural brotherly bond with him, they weren't very close since as kids, Akihiko would sometimes blame Kaiden when things didn't go his way and Kaiden hated that Akihiko would treat him like a baby.

However, when Akihiko comes back into his life with Ren and Isamu, Kaiden refuses to go anywhere with them until he learns that it's Daichi who needs help getting rescued from the Foot Clan.

Isamu Nakamura - biological older brother. Much like Akihiko and Kaiden, he did shared a natural brotherly bond with him where the two enjoyed each other's company but Kaiden hated it when Isamu would treat him like a baby just because he was the youngest.

However, when Isamu comes back into his life with Ren and Akihiko, Kaiden refuses to go anywhere with them until he learns that it's Daichi who needs help getting rescued from the Foot Clan.

Daichi Nakamura - biological older brother. Out of all of his brothers, Kaiden was the closest with Daichi since the two have a lot more in common and because Daichi doesn't treat Kaiden like a baby since he knows what it's like to be treated like one by their brothers. Although Kaiden does love his brothers the same, Daichi also happens to be his favorite brother since the two are very close with the other.

The night before his brothers disappeared, Daichi gave Kaiden his black vest and promised to come back one day. Since then, Kaiden hasn't took the vest off so when he learns that Daichi is in trouble, it's enough for him to go with his other brothers to save Daichi.

Dante Sinclair - father figure. When his brothers "abandoned" him, Kaiden dedicated himself to his training and making Dante proud since in his eyes, the man was all he had left. However, when Kaiden learns that Dante could've been behind the murder of his parents and the disappearance of his brothers, Kaiden will cut all ties with the man and resort to helping the others bring a stop to him.

Physical Appearance:
Due to his training, Kaiden is known to be a bit muscular and athletic. He has black hair and chocolate brown eyes. He is seen wearing a white t-shirt with short sleeves, a black vest, grey jeans, and black combat boots.

Personality:
At first glance, Kaiden can be described as emotionless due to him pushing his emotions deep down and forgetting all about them because of his training. He can be very bluntly and straightforward, which causes him to said things that he doesn't mean. Not only that, Kaiden tends to have a hard time at realizing when he needs to keep his mouth shut, which happens when he doesn't see why Briana keeps trying to go after John [OC owned by GeekyCookie1] to try to save him from the dark path he's following and he ends up being scolded by the five mutant turtles and Henry Hart when Kaiden makes Briana upset when he insults John [OC owned by GeekyCookie1] in front of her.

Eventually and still in progress of understanding his emotions again, Kaiden slowly starts to smile a tiny bit more. Although he can still be a tiny bit bluntly sometimes and said things without meaning them by the time he meets Karai/Miwa Hamato, it's safe to said that Karai/Miwa Hamato would sometimes help him out and would try her best to explain what it is that he's feeling as the two get to know each other.

By then, Kaiden is a lot more nicer than he came across off and caring. He is loyal, trustworthy, smart, protective, and sweet.

Medical Conditions or Disorders?:
Post Traumatic Stress Disorder/PTSD - A disorder in which a person has difficulty recovering after experiencing or witnessing a terrifying event. The condition may last months or years with triggers that can bring back memories of the trauma accompanied by intense emotional and physical reactions [definition came from Google].

Anxiety Disorder - A mental health disorder characterized by feelings of worry, anxiety, or fear that are strong enough to interfere with one's daily activities [definition came from Google].

Mental Illnesses?:
None.

Any Allergies?:
None.

Any Pets?:
None.

Any Abilities & Skills?:
• Martial arts/hand-to-hand combat training - Kaiden has been trained in martial arts by Dante Sinclair and knows how to kill a person in every way.

• Assassin training - Kaiden has been trained to kill by Dante Sinclair in every possible way that he can think of.

Close Friends:
None.

Best Friends:
I. Daichi Nakamura [currently].
II. Briana Gem Sentry-Hamato [currently].

Friends:
I. Diana, Leonardo, Raphael, Donatello, Michelangelo, and Eclipse [OC owned by GeekyCookie1 /soon].
II. Henry Hart, Kaz, Mara Sparks [OC owned by MariChat3], Zane Carson [OC owned by MariChat3], April O'Neil, and Casey Jones [soon].

Rivals:
None.

Allies:
I. Dante Sinclair [soon-to-end].
II. Briana and her family [soon].

Enemies:
I. Dante Sinclair [soon].
II. The Foot Clan, Jake Sentry, Soren Chandler and Cameron Chandler [OCs owned by MariChat3], Noelle Winters and Tyson [OCs owned by MariChat3 /soon-to-end].
III. Briana and her family [soon-to-end].

Occupation:
• Master assassin [formerly in the future/once he cuts ties with Dante Sinclair].

Likes:
His family and friends, tv, understanding his emotions again, art, painting, reading.

Dislikes:
His enemies, losing the ones he cares about, his nightmares.

Fears:
Losing the ones he cares about.

Any Phobias?:
Autophobia, also called monophobia, isolophobia, or eremophobia - the fear of being alone, isolated, abandoned, or ignored [definition came from Google].

Backstory:
To be developed.

Theme Song:
Perfect For Me by Justin Timberlake.

[There should be a GIF or video here. Update the app now to see it.]

Quotes:
[ongoing].

"If we're so different then... why do I care about you more than anyone else in the world? It's weird... right?" — This is basically when Kaiden is confused about his feelings/how he feels around Karai/Miwa Hamato.

"Okay, look, if there was a brother I might do this for, and I'm not saying there is! It... it would be Daichi." — Kaiden to Karai and the others when his three oldest brothers come asking for help and reveal that Daichi was in trouble.

Other Facts:
[ongoing].

1. Kaiden's relationship with Dante Sinclair is similar to Karai/Miwa Hamato with Oroku Saki/The Shredder before she found out the truth.

2. Kaiden gets annoyed with the nickname Baby Kai, which is because his three oldest brothers treat him like one.

3. He can speak fluently in Japanese but in English as well.