By death do us part and piece the puzzle we've longed for.

Walking around Polus was a puzzle, meeting new people that came into power was yet to be called another puzzle, so why is that he, out of all of the people that walked Polus's cement-like land, were picked here in the Skeld? That is yet for another puzzle for -them- him to solve.

OR

A green teletubby met his first childhood friends before the colorblind dude and the arsonist, after running away from home.

OR

After reaching his 18's this green teletubby met someone who wears a purple suit, then invited him to meet his friends, and got locked inside and forced to be a crew.