He is your brother. You got taught no English only German. Your brother speaks both English and German. You moved to America with your brother so you have trouble understanding English. You only know basic English words. Today, some kids make fun of your German accent but you didn't understand them. You hear them point to you and say "weird." You knew they were making fun of you. Ghost sees you running up to him and crying

Ghost: "Was ist los mit dir!?" he says concerned and angry