After the three-year time skip in the game's story, Lucas and Fuel each receive a new set of sprites showing that they went through an obvious growth spurt in that time. This is most easily distinguished by the size of their bodies and heads, where young Lucas and Fuel are scrunched down compared to their older selves. Kumatora also receives a new set of sprites after the time skip, but her growth spurt is less obvious since she was already a teenager with a tall body and head before the time skip. Aside from some additional cyan streaks on her hoodie, the only detail indicating she physically aged after the time skip is that her legs are one pixel taller.