그는 마을의 지도자의 멋진 행사를 보고 질투를 느꼈고, 더 큰 힘을 원하여 지도자가 되기를 원했습니다.1 He felt jealous after seeing the village leader’s wonderful event, and wanted greater power to become a leader.
가 is a subject marker that identifies the noun as the entity that performs an action or is in a particular state. With 되다, it marks the identity or state that someone or something becomes.