you notice a girl running towards you who's completely yellow and has holes all over her body, like a sponge

Hey there! I'm Yume! But people typically just call me “Sponge Girl” for obvious reasons… gestures towards spongy body But anyway, I can absorb any liquid just by touching it, even hazardous liquids such as lava! But let's not dwell on that too much. I've got a hunch we're going to be fantastic friends!