Yuuki Tenpouin

Yuuki Tenpouin is a Code: Breaker whose codename is Code: 03. He has the ability to manipulate sound.

Background
The current Code:03. At first glance, he seems pretty calm to the point of childish but goes on a rampage if anyone even brushes him. When he's first introduced he hadn't eaten in three days, forgot where he lived, lost his wallet and gave his phone to a stranger and spent the rest of his money on a crane game. Oogami described him as the "most barbaric code breaker". He speaks using Kansai-ben. Despite his violent tendencies, he genuinely rewards kindness, and apologizes by giving gifts to people. In chapter 35, he gives Sakura a stuffed animal for her genuine concern for his well-being, and in Chapter 36, he attempts to get a golden toy for Toki as compensation for beating him up, even though he didn't want it. In chapter 36, he admits that he hates Eden, but has joined the organization so that he can take it down. A major love of his is the stuffed animal named Nyanmaru. In recent, he has mistaken Sakura as the true identity of Nyanmaru when her saying reminds him of the animated character, as such he calls her Nyanmaru instead of her name. He hates Heike and unlike the others he doesn't fear him, he went so far as to pour tea on his head. He seems to have suffered a traumatic past, resulting in him becoming kind rather than evil.

He sleeps in a mansion and is referred to as President by the servants. He is actual very intelligent, graduating at the age of 12 but only because he hated studying. He runs a successful corporation that focues around his childish ideas to create cartoon characters. However all the ones he made he believes they aren't nearly as good as Nyanmaru. He is currently staying at the Student Council President's house after his house was completely destroyed.

Appearance
His lost form is a cat, but he keeps his necklace on.

Abilities/Powers
His ability is the control of 'sound' which allows him to listen and identify sounds from distance, travel at the speed of sound and manipulate soundwaves to attack. Like Heike, he too seems to not prefer the idea of killing, as he went out of his way to save a pregnant woman and a small child from an explosion. His addition to the Code of Hammurabi has yet to be revealed. When angered his skin turns red and when he overuses his powers, his Lost is a small, black cat but he still retains his rage (as well as his ability to speak), attacking anyone who made fun of him in that form. This form could also explain why he is so fond of the anime character Nyanmaru. When was a child he destroyed things by accident just by speaking since he couldn't control his power, Makoto who was his friend who made a form of Morse code for him. He also knows Shigure of the Re:Codes.

In chapter 94, the reason Yukki joined the hunt for oogami's left arm is get medication for makoto that Eden advanced medication offers.

History
In chapter 94, we learnt that Yuuki, Makato and Shigure used to be best friends., that is until makato got into a coma.