Fritz along with Otto and Ursula were laboratory mice that were experimented on by Joseph Mengele while he was working on his doctorate. These three mice which Mengele named his “Three Blind Mice” were the only ones to survive out of thousands of mice.

Mengele was meaning to destroy the mice after he left medical school, but somehow forgot about actually doing it. This may be due to influence by Otto. Each of the mice exhibited mental powers. Otto exhibited mental domination, while Fritz exhibited psychokinesis, and Ursula exhibited the ability to implant images into others minds. At first Fritz’s powers were weak, but over the decades they’ve grown stronger.

At first the thee mice concerned themselves with just surviving, and not getting eating by stray cats or hungry hawks. Fritz’s psychokinesis provided a lot of protection to the three mice. However, it was the Allied bombing of the medical school that actually got the mice to leave the school and Germany

Over the decades the “Three Blind Mice” have traveled all over the world, where they sampled all kinds of cheese, and cause mischief to the humans wherever they went.

It was Otto who proposed that they could run the world better than the humans. At first Fritz, and Ursula weren’t convinced, but later came around to Otto’s way of thinking.

The mice returned to Hamelin Germany, and set up house again. Otto started experimenting on homeless people; taking control of their minds. This proved so successful that the mice started taking control of police, politicians, and criminals in the city. It wasn’t long before the mice controlled the city. Now Fritz can finally sit back watch some television, and pork out on some junk food. Life couldn’t be better for Fritz.

Fritz has always looked up to Otto. In Fritz’s mind, if it wasn’t for Otto, he and Ursula both would’ve ended up on Mengele’s vivisection table. This means a lot to Fritz, and his loyalty to Otto is unquestionable.

Fritz likes the good life. He likes to have several bags of junk food to munch on while he’s watching television. All that pigging out has made Fritz into a coach potato. Only the other two mice seem to get Fritz’s attention to long. For Fritz he’s more of a live and let live, so long has he has his junk food.

Fritz claims to be expert when it come to pop culture. The few times that Fritz ever gets upset is when his knowledge of television trivia is put down or ridiculed. Of course if the person he’s talking too cannot speak to him telepathically or understand how to talk to a mouse, all they’ll hear is a mouse squeaking. Only Otto has telepathy.

"Squeak!"

Fritz is a psychokinetic mouse, which means he can move objects with his mind. His psychokinesis allows the mice the ability to manipulate objects that normally they wouldn’t be able to. Not only can Fritz manipulate objects, but people as well.

Most of his abilities that Fritz developed where in instances where he was defending Otto and Ursula. Fritz has learned to pick up a foe and spin them faster and faster causing his victim to become disorientated. Another ability that Fritz has developed is to surround a foe with a psychokinetic field preventing them from moving at all. Fritz can also limit the field to surround a targets head cutting them from oxygen. These targets usually pass out.

Fritz like the other two mouse have developed the ability to surround themselves with a telekinetic bubble that protects them from most attacks. Unlike the other two mice, Fritz can use his powers to fly the three mice from place to place.

Fritz looks like any other laboratory mouse. He’s a little heavier than most, but he’s still just a mouse. However, mentally Fritz is quite the powerhouse. Naturally only those attune to psychic powers are even aware of this. Otherwise Fritz is a chubby mouse with white fur and little pink ears and tail.