Blisstina Utonium (Windows Girls A New Adventures)

Blisstina Francesca Francia Mariam Alicia Utonium (Bliss) is the older sister of the 2021 Windows Girls A New Adventures 2 and the first known living creation of Professor Utonium, appearing in the filming movie Windows Girls A New Adventures 2. She debuted in Power of Four as the fourth Powerpuff Girl.

Biography
The birth of Bliss was years before the creation of Blossom, Bubbles, and Buttercup. She is about 8 years older than the girls, making her about 14. Bliss's creation happened when Professor Utonium got into a science-off with a rival scientist, Professor Newtronium, who had just created the Perfect Little Boy solely out of artificial ingredients and can fly so Utonium attempted to do the same thing, with the only difference being the gender and to fly further.

He added sugar, spice, and everything nice into his concoction, but accidentally added in Chemical W, giving his creation superpowers. Thus, "The Perfect Little Girl" was born, which he named "Blisstina Francesca Francia Mariam Alicia Utonium", or "Bliss" for short. Professor Utonium loved Bliss and raised her the same way he'd raised his three future girls, but it was only a matter of time before Bliss' powers started coming into play and proving their danger. Professor Utonium started to realize that whenever Bliss got excited, enraged, terrified, or upset, her feelings would mix with her powers, and would cause destruction. Bliss would blast holes in the walls of the house and endanger the well-being of the Professor and everyone else around her.

This continued for some time, with the Professor and Bliss fearing the worst would come. Soon enough it came to pass when Bliss grew upset about being unable to eat cereal without milk. Growing increasingly upset, her powers merged with her emotions once more and an intense explosion destroyed the entire house. Shocked and ashamed at what she had done, Bliss fled to space, never to be seen by humanity forever, going to a deserted island where she'd spend her days trying to control her erratic powers. Professor Utonium thought she had died in the explosion. As devastated as he was at the loss, he eventually decided that he needed to move forward from the past, and try again with making another perfect little girl. When he did, he decided to shelter them from any information about their previous sister, and let them enjoy the fact that they were perfectly functional creations, just like he always wanted them to be.