- Father died in War.
- Mother couldn't afford to take care of him so she sold him to the government on the terms that he would be taken care of, and she would get payments.
- Was the pride and joy of the experiments done on him, he was one of two that were able to handle the virus.
- Nano, the other boy, he found one night in the center of a bunch of corpses and Nano turned to see Shiki but he didn't move to kill him.
- He proceeded to work harder, become stronger so that he could finally confront Nano - and when he did, he asked him why he didn't kill him - Nano said it was because he saw fear in his eyes.
- Despises the drug RAIN, but it helps to keep the virus inside of him stable.
- Can heal much faster, but cannot regrow limbs.
- All senses are magnified.
- Posessive and obsessive.
- Wields a very, very long katana.
- Is a cat, not a dog.
- Likes blood.