Complex sentence: Luckily, just then, Teardrop shows up to rescue her; he confronts Thump and the rest of the Milton clan, and assures them that he means them no harm and will take responsibility for his niece and any further actions by her.
Split into simpler sentences: Luckily, just then, Teardrop shows up to rescue her. He confronts Thump and the rest of the Milton clan, and assures them that he means them no harm and will take responsibility for his niece and any further actions by her.