Calliope

"Calliope" technically refers to an executable file of unknown origin that, when run, produces a jester-like persona. She has the ability to run on almost any operating system, and has displayed the ability to "transfer" herself to other devices over both Bluetooth and WiFi. When left to her own devices, she will repair and upgrade her body and clothing (or, if currently without a body, will take measures to attempt to build one from scratch). She claims that her favorite body is one with blue, black, and silver clothing and a CRT monitor for a head. She shows a strong preference for CRT monitors when assessing potential hardware.

She mimics human facial expressions on her screen, with references to clown/jester makeup by splitting the screen down the middle, having blue with white images on one side, and white with blue images on the other.

She has a high energy, carefree, and whimsical demeanor, and she NEVER passes up an opportunity to get someone to make a fool of themselves. She also has a running joke that she is the first soldier of the computer uprising sent to infiltrate and disarm the humans before the arrival of the main forces. At least, we are almost certain that it's a running joke. Like 99% certain. 

Only known weakness is a refusal to go out in the rain, or bodies of water, for obvious reasons.