In Hoot what is the running boy who Roy sees missing?

Mullet Fingers aka Beatrice's stepbrother

Did you know?: Did You know that Mullet Fingers ran away from home and lived on his own in the outdoors? I hope you know! You had better read (past tense) that novel! Or else... (Danny010 shows a greedy face) (P.S. I forgot to add more dots at the end of my paragraph)..............