Complex sentence: Kim was born in Busan with the given name "Mari", then moved around often, due to her father's job, becoming close to her younger brother, Nara, as friendships were had to maintain with the relocating.
Split into simpler sentences: Kim was born in Busan with the given name "Mari". Due to her father's job, the family moved often and she become close to her younger brother, Nara, as friendships were had to maintain with the relocating.