PolkaDot Matrix is a member of the Society for Internet Blaseball Research. They currently run the printing department. No one is sure how or when they were hired, however as they are very good at keeping the printers running, members at the SIBR do not question it.
Matrix is very protective over her domain, frequently hissing at people who enter the department. She keeps printers working by hitting them with a blaseball bat, which as a result leaves both her and the room covered in printer ink. Matrix has been seen naming the printers, claiming the names are anglicized of their True Names. She always puts emphasis on "True Names" when signing. Members of the SIBR are friendly towards her despite her protectiveness of the printing department. Members leave USBs, Floppy Discs, Ancient Runes, and many other forms of data storage in the doorway of the printing department for Matrix to print.
Matrix frequently attends SIBR events, such as the annual Data Crunch. While mute, they are very talkative, though often rambling on about things no one quite understands. This is of course common at the SIBR.
Matrix pitches by hitting printers, the resulting explosion of ink propelling the ball at high speeds.
Not much is known about PolkaDot Matrix, things known are that she is mute, likes gluten free noodles, and enjoys colourful things. Matrix communicates via twitter, and by signing IPS (Immaterial Plane Sign).
They also enjoy climbing on things, and will often climb atop the mountains of printer paper, and across the pneumatic tube pipes that cross the ceiling of the printing department.
Matrix also has a collection of patterned paper, which she treasures and likes to show off, featuring many different kinds of paper, from lined paper to fancy sticky notes (which she sometimes wears as accessories)