Narcisius

oekaki

Glitchy boi! He's quite narcissistic, and he even changed his name to suit that arrogant personality.
His story would roughly be someone who tried to cheat at life by hacking into [something], which backfired and made him into something that reacts violently with technology (since he's a walking glitch). Either he'll be hunted down for trying to break into [something], be lost as he's never lived without tech, damage important systems just by touching it, or all of the above.

Not sure if he's had his portal powers before or after this event. But he's partially pixels after this, and can also shapeshift into code and enter systems (but at a cost)

His portals let him travel through space (eg see tail), and/or between a 2D pixel look or a 3D normal look. However he is always partially pixels, hence always has at least 1 portal visible.

Some still refs: one :: two :: three (although any glitch look works)

Three gifs with fast flashing colours warning here (click at own risk! mild ver :: another mild ver :: extreme ver)