Kentaro was born in Sakai City in the prefecture of Osaka in Japan. While it may be hard to people to hear it, he still speaks with an accent from his hometown, although you can tell pretty much only when he speaks in Japanese. Kentaro is multilingual, he speaks a bit of Mandarin, Korean and English. He has always been a very curious person, which explained why he picked those languages. He likely would have learned more - and is sometimes considering it - had he not grown a liking for science instead. Kentaro hates when people talk to him in Japanese, or, to be exact, gives him one or two words as though he doesn't understand hello or goodbye in English. Or worse, when they mimic his accent as he speaks. Yes, English is not his first language, there is no need to mock the way some words sounds because of that.

As a child, his life was uneventful. Like any other kid his age, he had friends, went to school, did chores and got tormented by his older sister Momoe as per the 'older sibling's right'. It was nothing too scarring though, mere sibling's love, until she started losing interest in him to focus more on idols or hair product. If he joined a few clubs  in his youth, he didn't like science back then. This came later in his life . Back then, he was more into soccer or simply playing with friends.

It was known in the family that some of its members were mutants. Kentaro happened to be one of them. He found out at fourteen. At that time, he had a cast, having broken his wrist. He pushed another student away from him and the boy fell on the floor, in pain. Kentaro thought it was highly exaggerated, since he didn't even push him that hard. It turned out that he gave the boy his broken wrist, or at least fractured the bone somehow. His wrist still being in a cast, he had no idea it was his power manifesting just yet, but other small incidents happened during the next few days, where he just suddenly took on people's cuts and bruises. Again, he wouldn't have thought much of it - he just thought he could not remember when he hurt himself but must have done so while playing - had someone not found the incident with the other boy peculiar and recruiters came knocking at his door. A week after the first incident, Kentaro was then sent to Saino, the Japanese school for mutants.

It was there that Kentaro's curiosity took him to science. He wanted to know everything about his power, and about his fellow students'. He wanted to understand more than how to handle it but why he got it, how it worked, on a genetic level. Kentaro took part of every science-oritented clubs within the schools and always volunteered to work on the labs, even if all he had to do was to clean test tubes. Luckily for him, Kentaro had the smarts to back up his curiosity, something people wouldn't have guessed at first glanced with out easily he lost things or couldn't find his way around. When it comes to space, Kentaro simply has a terrible sense of direction.

Upon graduating, Kentaro refused to leave it at that. He studied medecine, mostly genetics. His hope was to become some sort of expert on mutation. He was fascinated by the limitations and side-effects, trying to suppress those if that was possible. He knew it was a controversial matter for some but he didn't see it that way. When Kentaro is interested in something, he goes all the way, even if his actions may be regarded as villainous by some. He can even manipulate people or experiment on them without them even knowing to what extent, all this for curiosity's sake. This is what led him to want and seek out other experts and see how mutations were handled elsewhere. He made a request to travel and gather some data on the matter. Bellefonte welcomed him.

Kentaro was still there when Bellefonte fell. He was among those that were caught. At first, he ordered them to release him and let him go back to Japan, claiming they had no right to hold him. Of course, they had no desire to comply. Saino eventually fell as well. Not to add that the government got their hands on his research and became really interested in it. To his surprise, they made him quite an offer. They let him work about powers, their limitations and their side-effects on as many mutants as he wanted. All he needed for that was to become a Guardian and they'd give him everything he wanted. He knew what that meant, what they could do with that knowledge, but this research was what interested him the most and he was certain it could also do good to the powered people. Sometimes, doing a little evil can lead to something good. That is what he believes. Kentaro can end up considering his ‘projects’ almost like his babies and any achievements they do afterwards makes him proud. He truly believes he can help them, despite them being stuck in camps. It isn’t like he is totally free himself.

HEALING TRANSFER
Ken has the ability to transfer someone’s wounds/disease onto him and vice versa. His power works on both humans and animals. He needs to physically touch a person (skin to skin contact with his hands) for it to work, preferably where the wound is. Anywhere is fine but it will take longer for the transfer to occur and he risks passing on more than he meant to. Simply touching is not enough however, he must also have a desire to take the pain or pass it on, or at least to heal the person or himself. Whenever there is a transfer, the gravity is reduced by a fourth. A broken bone will become a micro-fracture for example. If he transferred it onto him, it will also eventually heal entirely although the process can take from a few minutes to several days, depending on the initial gravity of the wound/disease. Every time Ken takes on someone’s pain however, his cells will more rapidly heal it compared to a normal wound/disease. This process depends on the gravity and effects he might have suffered due to the transfer with the healing being of a few minutes in minor bruises to a few days in terms of deeper, life-threatening wounds. This healing deteriorates his cells at a more rapid rate however. If he keeps healing repeatedly and it is left unattended, it can shut down his whole system, much like a widespread cancer. This is where his transfer ability becomes vital: he must pass it on a living being in order to regenerate his cells. The creature will die of it however.

LIMITATIONS
- Ken can only heal physical ailment. He cannot cure mental diseases. He also cannot grow back limbs or heal deformities as the person was born like this. He cannot make scars disappear as the wound healed already.
- Certain powers can prevent his from working (if it is some form of shield or thickened skin to resist certain attacks). He cannot heal or transfer wounds to those people.
- While he can save someone on the brink of death, once they are dead, there is nothing he can do.
- He must have a desire to heal in order for his power to work. In other words, if threatened, his power will refuse to work. Through training, he managed to control desire to make it into intent and prevent from healing just anyone all of the time, but he cannot heal or transfer wounds to someone without meaning to do so.
- He must touch the person's skin with his hand(s) in order for the transfer to occur, there mustn’t be clothes in the way (hair, scales or feathers are not an issue however). The transfer cannot happen if there is no contact. It is almost instantaneous, deeper wounds/graver diseases taking only a few seconds for the transfer to occur.
- While he can heal faster from a wound he transferred onto himself, injuries he would get normally will not heal faster. He also cannot pass down his rapid healing to a person but the wounds are naturally reduced by a fourth of its original gravity during a transfer. It is this rapid cell regeneration that also causes them to deteriorate faster.

SIDE-EFFECTS
- While Ken will eventually heal from the injury he passed onto him, anything being a consequence of that injury remains. If he took on a stab wound, he will still have to get over the blood loss. If the blood loss was big, he will lose consciousness and will not awake faster just because his body healed the wound, it will take a normal amount of time.
- Until his body regenerates from whatever ailment he transfered onto him, he will endure the effects of it. If the person was coughing, he will be coughing too until healed.
- Healing people causes his cells to decay and die, much like a cancer that will originate where he healed the first person. He may be able to regenerate enough cells after one or two small healings, but prolonged use makes the cells die all over his body which can then shut down his system and kill him. It can also leave necrosis on the area until the transfer that can be spotted by people. He cannot naturally heal from it, he needs to transfer it to another host who will die from it.
- Since the only way to heal the cell deterioration is to pass it on another living being, his power basically demands that Kentaro kills in order to survive. Even if he does so mostly on rodents, this still leaves deep emotional and psychological scars.