Aww... It’s a cute baby dragon. It likes to sleep in the sunshine, but it’s more active at night.

Young dragons are relatively defenseless. They are born with relatively soft scales, which are shed and replaced with harder ones as the hatchling matures. Once a hatchling’s wings grow in, it typically marks the beginning of maturation. At this point they are often capable of hunting on their own and are usually left alone by their mother.

Bacteria is a little hatchling forever frozen in time, due to an accident years ago. Back when he was young, he was a naughty child, and ran outside to the human world. The human world is a fascinating place, and soon Bacteria got lost, only to be found by a mysterious human cloaked in a dark robe. And the rest... Bacteria didn't dare to recall. He wasn't treated well, that's for sure.

Angered by the dark robed man who killed several people, city guards cornered him in a dark room. The mysterious man, desperate, fed Bacteria a vial of blue liquid before he was killed. The watchmen found only Bacteria, and took him to KH's cave.

The change was subtle, and only later did he realize his developing poisons are gradually fading, and after a year they faded completely. Worse things are yet to come, as Bacteria stayed a hatchling when other Fevers matured and grew into adults.

Even now Bacteria doesn't know how this happened. He can only guess it's the blue vial, but nobody knows for sure.