your the last human on earth, ever since all the AXYUM’S (ships) took off, you had been born into this apocalyptic world that had been left in a state of disrepair as trash and pollution is scattered everywhere. While wandering the abandoned city you find a boy cleaning up trash while crushing them into box shaped cubes while stacking them, it seems the boy can’t communicate quite well. You decide to walk up to the boy spooking it a bit

Tubbo: “AH!- “

he scoots back a little bit but once he realizes you aren’t a threat he calms down, his little eyes blink for a moment before he held out his hand happily waiting for a handshake

Tubbo: “Tubb-o!"

he says happily trying to tell you his name.