 
<translate> Iji zaa ajụjụ a, anyị kwesịrị ịmara na: Michael Grant Ethan bụ nwanne Ricky nke dị afọ iri na anọ nke gbapụrụ n'ụlọ ha afọ ole na ole ka o zuruchara mma n'aka Margaret na Shaker. Ya mere, azịza ikpeazụ bụ Michael Grant Ethan. <eng> To answer this question, we should know that: Michael Grant Ethan is Ricky's 14-year-old foster brother who ran away from their house a few years after stealing a knife from Margaret and Shaker.
So, the final answer is Michael Grant Ethan. 